Deuteronomy 16:11-14

And rejoice before the LORD your God at the place he will choose as a dwelling for his Name—you, your sons and daughters, your male and female servants, the Levites in your towns, and the foreigners, the fatherless and the widows living among you. Remember that you were slaves in Egypt, and follow carefully these decrees. Celebrate the Festival of Tabernacles for seven days after you have gathered the produce of your threshing floor and your winepress. Be joyful at your festival—you, your sons and daughters, your male and female servants, and the Levites, the foreigners, the fatherless and the widows who live in your towns.