Deuteronomy 16:7-9

Revised Standard Version Catholic Edition

⁷ And you shall boil it and eat it at the place which the Lord your God will choose; and in the morning you shall turn and go to your tents. ⁸ For six days you shall eat unleavened bread; and on the seventh day there shall be a solemn assembly to the Lord your God; you shall do no work on it.

The Festival of Weeks Reviewed

⁹ “You shall count seven weeks; begin to count the seven weeks from the time you first put the sickle to the standing grain.