Deuteronomy 16:10-13

10Then you shall 1celebrate the Feast of Weeks to the Lord your God with a 2voluntary offering of your hand in a proportional amount, which you shall give just as the Lord your God blesses you; 11and you shall 3rejoice before the Lord your God, you, your son and your daughter, and your male and female slaves, and 4the Levite who is in your 5town, and 6the stranger, the 7orphan, and the widow who are in your midst, at the place where the Lord your God chooses to establish His name. 128You shall also remember that you were a slave in Egypt, and you shall be careful and 9comply with these statutes.

13“10You shall 11celebrate the Feast of 12Booths for seven days when you have gathered in from your threshing floor and your wine vat;