YAHWEH’s Feasts: Shabuoth – Pentecost

YAHWEH’s  Torah (Law) was given from Sinai on
 the fiftieth day after the deliverance from Egypt

Shabuoth: a Jewish holiday observed on the 6th and 7th of Sivan in commemoration of the revelation of the Ten Commandments at Mt. Sinai — called also Pentecost (Merriam-Webster Collegiate Dictionary) 

Pentecost meaning

Pentecost meaning “the fiftieth day” or Harvest Feast or Feast of Weeks, may be regarded as a supplement to the Passover. It lasted for but one day. From the sixteenth of Nisan seven weeks were reckoned inclusively, and the next, or fiftieth day was the day of Pentecost which fell on the sixth of Sivan (about the end of May). Shemoth (Exodus) 23:16; 34:22; Vayiqra (Leviticus) 23:15-22; Bemidbar (Numbers) 28. 
The Pentecost was the Jewish harvest-home, and the people were especially exhorted to rejoice before YAHWEH with their families, their servants, the Levite within their gates, the stranger, the fatherless, and the widow, in the place chosen by YAHWEH for HIS NAME, as they brought a free-will offering of their hand to YAHWEH their  ABBA (FATHER). Devarim (Deuteronomy) 16:10,11. 
The great feature of the celebration was the presentation of the two loaves, made from the first fruits of the wheat harvest. With the loaves two lambs were offered as a peace offering, and all were waved before YAHWEH, and given to the priests; the loaves being leavened, could not be offered on the altar. The other sacrifices were, a burnt offering of a young bullock, two rams and seven lambs, with a meat and a drink offering, and a kid for a sin offering. Vayiqra- (Leviticus) 23:18,19. Until the Pentecostal loaves were offered, the produce of the harvest could not be eaten, nor could any other first fruits be offered.
The whole ceremony was the completion of the dedication of the harvest to YAHWEH as its giver, and to whom both the land and the people were holy, which was begun by the offering of the wave-sheaf at the Passover. The interval is still regarded as a religious season. The Pentecost is the only one of the three great feasts which is not mentioned as the memorial of events in the history of the Jews; but such a significance has been found in the fact that the law was given from Sinai on the fiftieth day after the deliverance from Egypt. Shemoth (Exodus) 12 and 19. In the exodus the people were offered to YAHWEH as being first fruits; at Sinai their consecration to HIM as a nation was completed. (Strong’s Concordance Greek #4005)

YAHWEH’s Blessings Upon HIS Memorial Day Pentecost

True to HIS Word, YAHWEH added HIS blessing on HIS Day as recorded in Acts 2:1-4;
And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Qadash Ruwach (Holy Spirit), and began to speak with other tongues, as the Ruwach (Spirit) gave them utterance. 

YAHWEH’s Word; Think Upon This

Prior to the children of Yisrael entering into the promised land, after the giving of the command to keep the Day of Pentecost, there were 3,000 souls lost in the wilderness.
Shemoth (Exodus) 32:28 And the children of Levi did according to the word of Moshe: and there fell of the people that day about three thousand men. 

Do you believe it was only a coincidence that YAHWEH not only poured out HIS Ruwach (Spirit) on the Day Of Pentecost, HE added such as should be saved in the same number?  Ma’aseh Shlichim (Acts) 2:41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.