Deuteronomy 16: 13-15    

The Festival of Booths Reviewed

13 You shall keep the festival of booths[a] for seven days, when you have gathered in the produce from your threshing-floor and your wine press. 14 Rejoice during your festival, you and your sons and your daughters, your male and female slaves, as well as the Levites, the strangers, the orphans, and the widows resident in your towns. 15 For seven days you shall keep the festival to the Lord your God at the place that the Lord will choose; for the Lord your God will bless you in all your produce and in all your undertakings, and you shall surely celebrate.