Deuteronomy 16:9-15

Count seven weeks from the time you begin to harvest the grain, and then celebrate the Feast of Weeks for the LORD your God. Bring an offering as a special gift to him, giving to him just as he has blessed you. Rejoice before the LORD your God at the place he will choose to be worshiped. Everybody should rejoice: you, your sons and daughters, your male and female servants, the Levites in your town, the strangers, orphans, and widows living among you. Remember that you were slaves in Egypt, and carefully obey all these laws. Celebrate the Feast of Shelters for seven days, after you have gathered your harvest from the threshing floor and winepress. Everybody should rejoice at your Feast: you, your sons and daughters, your male and female servants, the Levites, strangers, orphans, and widows who live in your towns. Celebrate the Feast to the LORD your God for seven days at the place he will choose, because the LORD your God will bless all your harvest and all the work you do, and you will be completely happy.