Deuteronomy 16:8-10

Revised Standard Version Catholic Edition

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. ¹⁰ 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;