Deuteronomy 16:8-10 English Standard Version Anglicised (ESVUK)
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 Feast of Weeks
9 “You shall count seven weeks. Begin to count the seven weeks from the time the sickle is first put to the standing corn. 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.