Exodus 34:22
You shall observe the Feast of Weeks, the firstfruits of wheat harvest, and the Feast of Ingathering at the year's end.
Exodus 23:16
You shall keep the Feast of Harvest, of the firstfruits of your labor, of what you sow in the field. You shall keep the Feast of Ingathering at the end of the year, when you gather in from the field the fruit of your labor.
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 shall have a holy convocation. You shall not do any ordinary work, and you shall keep a feast to the LORD seven days.
Deuteronomy 16:10-15
Then you shall keep the Feast of Weeks to the LORD your God with the tribute of a freewill offering from your hand, which you shall give as the LORD your God blesses you.
John 7:2
Now the Jews' Feast of Booths was at hand.
Acts 2:1
When the day of Pentecost arrived, they were all together in one place.