Deuteronomy 16:7-9

New Century Version

⁷ Roast the meat and eat it at the place the Lord your God will choose. The next morning go back to your tents. ⁸ Eat bread made without yeast for six days. On the seventh day have a special meeting for the Lord your God, and do not work that day.

The Feast of Weeks

⁹ Count seven weeks from the time you begin to harvest the grain,