Deuteronomy 16:13-17

“You shall celebrate the Feast of Booths seven days after you have gathered in from your threshing floor and your wine vat; and you shall rejoice in your feast, you and your son and your daughter and your male and female servants and the Levite and the stranger and the orphan and the widow who are in your towns. Seven days you shall celebrate a feast to the LORD your God in the place which the LORD chooses, because the LORD your God will bless you in all your produce and in all the work of your hands, so that you will be altogether joyful. “Three times in a year all your males shall appear before the LORD your God in the place which He chooses, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear before the LORD empty-handed. Every man shall give as he is able, according to the blessing of the LORD your God which He has given you.