The following scriptures tell us how to count to the Feast of Weeks (Pentecost)
Deu 16: v9. Seven weeks shalt thou number unto thee: begin to number the seven weeks from [such time as] thou beginnest [to put] the sickle to the corn (1st day of the week after 7th day of rest).
V10. And thou shalt keep the feast of weeks unto Yahweh with a tribute of a freewill offering of thine hand, which thou shalt give [unto Yahweh,] according as Yahweh hath blessed thee:
Lev 23: v14. And ye shall eat neither bread, nor parched corn, nor green ears, until the selfsame day that ye have brought an offering unto Yahweh: [it shall be] a statute for ever throughout your generations in all your dwellings.
V15. And ye shall count unto you from the morrow after the sabbath (weekly Sabbath), from the day (1st day of week within the Feast of Unleavened Bread that starts the count) that ye brought the sheaf of the wave offering (looks forward to true wave sheaf of barley when YahwehShua presents himself to the Father); seven sabbaths shall be complete:
V16. Even unto the morrow after the seventh sabbath (day after 7th weekly Sabbath, stop count) shall ye number fifty days; and ye shall offer a new meat offering unto Yahweh.
Holy Convocation on day 50 of the count.
Lev 23: v17. Ye shall bring out of your habitations two wave loaves (looks forward to Elijah, Moses, rest of 144k Saints ascension to Messiah in air at the 7th Trump) of two tenth deals: they shall be of fine flour; they shall be baken with leaven; [they are] the firstfruits unto Yahweh.
V20. And the priest shall wave them with the bread of the firstfruits [for] a wave offering before Yahweh, with the two lambs: they shall be holy to Yahweh for the priest.
V21. And ye shall proclaim on the selfsame day, [that] it may be an holy convocation unto you: ye shall do no servile work [therein: it shall be] a statute for ever in all your dwellings throughout your generations.
V22. And when ye reap the harvest of your land, thou shalt not make clean riddance of the corners of thy field when thou reapest, neither shalt thou gather any gleaning of thy harvest: thou shalt leave them unto the poor, and to the stranger: I [am] Yahweh.
The 12 tribes received the law (10 Commandments) on the 50th day at Mount Sinai.
Moses was instructed by our Creator to bring the 12 tribes to Mt Horeb (the real Mt Sinai in Midian; see Ron Wyatt’s work at arkdiscovery.com).
Exo 3: v1. Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of Yahweh, [even] to Horeb.
V12. And he said, Certainly I will be with thee; and this [shall be] a token unto thee, that I have sent thee: When thou hast brought forth the people out of Egypt, ye shall serve Yahweh upon this mountain.
Exo 19: v1. In the third month, when the children of Israel were gone forth out of the land of Egypt (left Egypt on 15th), the same day came they [into] the wilderness of Sinai.
V2. For they were departed from Rephidim, and were come [to] the desert of Sinai, and had pitched in the wilderness; and there Israel camped before the mount.
V3. And Moses went up unto Yahweh, and Yahweh called unto him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel;
V4. Ye have seen what I did unto the Egyptians, and [how] I bare you on eagles’ wings (angels), and brought you unto myself.
V5. Now therefore, if ye will obey my voice indeed, and keep my covenant, then ye shall be a peculiar treasure unto me above all people: for all the earth [is] mine:
V6. And ye shall be unto me a kingdom of priests, and an holy nation. These [are] the words which thou shalt speak unto the children of Israel.
V7. And Moses came and called for the elders of the people, and laid before their faces all these words which Yahweh commanded him.
V11. And be ready against the third day: for the third day Yahweh (the Son) will come down in the sight of all the people upon mount Sinai.
V14. And Moses went down from the mount unto the people, and sanctified the people; and they washed their clothes.
V17. And Moses brought forth the people out of the camp to meet with Yahweh; and they stood at the nether part of the mount (on Pentecost).
Exo 20: v1. And Yahweh spake all these words, saying,
V2. [I am] Yahweh thy Yahweh, which have brought thee out of the land of Egypt, out of the house of bondage
V3. Thou shalt have no other (so called) gods before me.
V4. Thou shalt not make unto thee any graven image, or any likeness [of any thing] that [is] in heaven above, or that [is] in the earth beneath, or that [is] in the water under the earth:
V5. Thou shalt not bow down thyself to them, nor serve them: for I Yahweh thy Creator [am] a jealous Yahweh, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
V6. And shewing mercy unto thousands of them that love me, and keep my commandments.
V7. Thou shalt not take the name of Yahweh thy Creator in vain; for Yahweh will not hold him guiltless that taketh his name in vain.
V8. Remember the sabbath day, to keep it holy.
V9. Six days shalt thou labour, and do all thy work:
V10. But the seventh day [is] the sabbath of Yahweh thy Creator: [in it] thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that [is] within thy gates:
V11. For [in] six days Yahweh made heaven and earth, the sea, and all that in them [is,] and rested the seventh day: wherefore Yahweh blessed the sabbath day, and hallowed it.
V12. Honour thy father and thy mother: that thy days may be long upon the land which Yahweh giveth thee.
V14. Thou shalt not commit adultery.
V13. Thou shalt not kill.
V15. Thou shalt not steal.
V16. Thou shalt not bear false witness against thy neighbour.
V17. Thou shalt not covet thy neighbour’s house, thou shalt not covet thy neighbour’s wife, nor his manservant, nor his maidservant, nor his ox, nor his ass, nor any thing that [is] thy neighbour’s.
The ten Commandments have been magnified in the New Covenant.
Mat 5: v21. Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment:
V22. But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
V27. Ye have heard that it was said by them of old time, Thou shalt not commit adultery:
V28. But I say unto you, That whosoever looketh on a (married) woman to lust after her hath committed adultery with her already in his heart.
V38. Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth:
V39. But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
V43. Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.
V44. But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
The 12 apostles received the Holy Spirit on Pentecost.
Act 2: v1. And when the day of Pentecost was fully come, they were all with one accord in one place.
V2. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
V3. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
V4. And they were all filled with the Holy Spirit, and began to speak with other tongues (different languages), as the Spirit gave them utterance.
V12. And they were all amazed, and were in doubt, saying one to another, What meaneth this?
V13. Others mocking said, These men are full of new wine.
V14. But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all [ye] that dwell at Jerusalem, be this known unto you, and hearken to my words:
V15. For these are not drunken, as ye suppose, seeing it is [but] the third hour (9am) of the day.
V16. But this is that which was spoken by the prophet Joel;
V17. And it shall come to pass in the last days, saith Yahweh, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
V32. This YahwehShua hath Yahweh the Father raised up, whereof we all are witnesses.
V33. Therefore being by the right hand of Yahweh the Father exalted, and having received of the Father the promise of the Holy Spirit, he hath shed forth this, which ye now see and hear.
V36. Therefore let all the house of Israel know assuredly, that Yahweh the Father hath made that same Messiah (our Creator), whom ye have crucified, both YahwehShua and exalted Master.
V37. Now when they heard [this,] they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men [and] brethren, what shall we do?
V38. Then Peter said unto them, Repent, and be baptized every one of you in the name of YahwehShua Messiah for the remission of sins, and ye shall receive the gift of the Holy Spirit.
V41. Then they that gladly received his word were baptized: and the same day there were added [unto them] about three thousand souls.
Pentecost is also symbolic of having hands laid on after baptism and is part of the New Covenant Doctrine of Messiah.
Act 19: v2. He said unto them, Have ye received the Holy Spirit since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Spirit.
V3. And he said unto them, Unto what then were ye baptized? And they said, Unto John’s baptism.
V4. Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on YahwehShua Messiah.
V5. When they heard [this,] they were baptized in the name of YahwehShua Messiah.
V6. And when Paul had laid [his] hands upon them, the Holy Spirit came on them; and they spake with tongues (different languages), and prophesied.
Heb 6: v1. Therefore leaving the principles of the Doctrine of Messiah, let us go on unto perfection; not laying again the foundation of repentance from dead works (Leaving Egypt, leaving sin, Feast of Unleavened Bread day 1), and of faith toward YahwehShua,
V2. Of the doctrine of baptisms (Red sea crossing baptism in the mist, Feast of Unleavened Bread Day 7), and of laying on of hands (Mt Sinai, 12 tribes receiving the Law, Pentecost 12 apostles received the Holy Spirit) and of resurrection of the dead (Feast of Shouting, 7th Trumpet 144k Saints meet Messiah in the air), and of eternal judgment (Last Great Day).
Pentecost is part of the perfect plan of Father Yahweh that is being carried out by the Son YahwehShua Messiah from start to finish (Alpha & Omega).