Deuteronomy 16:13-17

LITV(i) 13 You shall keep the Feast of Tabernacles seven days after you have gathered in from your threshingfloor, and from your winepress. 14 And you shall rejoice in your feast, you and your son, and your daughter, and your male slave, and your slave-girl, and the Levite, and the alien, and the fatherless, and the widow that are inside your gates. 15 You shall keep a solemn feast seven days to Jehovah your God in the place which Jehovah shall choose; for Jehovah your God shall bless you in all your produce, and in every work of your hands, and you shall be altogether joyful. 16 Three times in a year shall all your males appear before Jehovah your God in the place which He shall choose: In the Feast of Unleavened Bread, and in the Feast of Weeks and in the Feast of Tabernacles. And they shall not appear before Jehovah empty, 17 but each with his gift of his hand, according to the blessing of Jehovah your God, which He has given you.