Deuteronomy 16:15-17

King James Version

¹⁵ Seven days shalt thou keep a solemn feast unto the Lord thy God in the place which the Lord shall choose: because the Lord thy God shall bless thee in all thine increase, and in all the works of thine hands, therefore thou shalt surely rejoice.

¹⁶ Three times in a year shall all thy males appear before the Lord thy 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 the Lord empty:

¹⁷ Every man shall give as he is able, according to the blessing of the Lord thy God which he hath given thee.