Deuteronomy 16:8-10 New Life Version (NLV)
8 For six days eat bread made without yeast. On the seventh day there will be a holy meeting to the Lord your God. Do no work on this day.
The Supper of Weeks
9 “Number seven weeks. Begin to number seven weeks from the time you begin to cut the standing grain. 10 Then keep the Special Supper of Weeks to the Lord your God by giving a free-will gift. Give as the Lord your God has given to you.