Deuteronomy 16:13-16

13“You are to keep the Feast of Sukkot for seven days, after gathering in the produce from your threshing floor and winepress.”

14So you will rejoice in your feast—you, your son and daughter, slave and maid, Levite and outsider, orphan and widow within your gates.

15Seven days you will feast to Adonai your God in the place He chooses, because Adonai your God will bless you in all your produce and in all the work of your hand, and you will be completely filled with joy.

16Three times a year all your males are to appear before Adonai your God in the place He chooses—at the Feast of Matzot, the Feast of Shavuot, and the Feast of Sukkot. No one should appear before Adonai empty-handed—