Deuteronomy 16:15–16

15 You are to hold a seven-day festival for the Lord your God in the place he chooses, because the Lord your God will bless you in all your produce and in all the work of your hands,g and you will have abundant joy.

16 “All your males are to appear three times a yearh before the Lord your God in the place he chooses: at the Festival of Unleavened Bread, the Festival of Weeks, and the Festival of Shelters. No one is to appear before the Lord empty-handed.i