Exodus 34:22
"You must observe the Feast of Weeks -- the firstfruits of the harvest of wheat -- and the Feast of Ingathering at the end of the year.
Exodus 23:16
"You are also to observe the Feast of Harvest, the firstfruits of your labors that you have sown in the field, and the Feast of Ingathering at the end of the year when you have gathered in your harvest out of the field.
Numbers 28:16-31
"'On the fourteenth day of the first month is the Lord's Passover.
Numbers 29:12-39
"'On the fifteenth day of the seventh month you are to have a holy assembly; you must do no ordinary work, and you must keep a festival to the Lord for seven days.
Deuteronomy 16:10-15
Then you are to celebrate the Festival of Weeks before the Lord your God with the voluntary offering that you will bring, in proportion to how he has blessed you.
John 7:2
Now the Jewish feast of Tabernacles was near.
Acts 2:1
Now when the day of Pentecost had come, they were all together in one place.