Deuteronomy 16:10-13

10Then you shall 1celebrate the Feast of Weeks to the Lord your God with a tribute of a freewill offering of your hand, which you shall give just as the Lord your God blesses you; 11and you shall 2rejoice before the Lord your God, you and your son and your daughter and your male and female servants and 3the Levite who is in your 4town, and 5the stranger and the 6orphan and the widow who are in your midst, in the place where the Lord your God chooses to establish His name. 127You shall remember that you were a slave in Egypt, and you shall be careful to observe these statutes.

13“8You shall 9celebrate the Feast of Booths seven days after you have gathered in from your threshing floor and your wine vat;