Deuteronomy 16:10

You shall roast and eat it in the place which the LORD your God chooses. In the morning you shall return to your tents.

Six days you shall eat unleavened bread. On the seventh day shall be a solemn assembly to the LORD your God. You shall do no work.

You shall count for yourselves seven weeks. From the time you begin to put the sickle to the standing grain you shall begin to count seven weeks.

You shall rejoice before the LORD your God: you, your son, your daughter, your male servant, your female servant, the Levite who is within your gates, the foreigner, the fatherless, and the widow who are among you, in the place which the LORD your God shall choose to cause his name to dwell there.

You shall remember that you were a slave in Egypt. You shall observe and do these statutes.

You shall keep the feast of booths seven days, after you have gathered in from your threshing floor and from your wine press.