“And on the day of the first-fruits, when you bring a new grain offering to Yahweh at your Festival of Weeks, you have a set-apart gathering, you do no servile work.” Numbers 28:26   

“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 Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance. Acts 2:1-4