Deuteronomy 16
14 Ref You are to keep the feast with joy, you and your son and your daughter, your man-servant and your woman-servant, and the Levite, and the man from a strange country, and the child without a father, and the widow, who are living among you.
15 Ref Keep the feast to the Lord your God for seven days, in the place marked out by the Lord: because the blessing of the Lord your God will be on all the produce of your land and all the work of your hands, and you will have nothing but joy.
16 Ref Three times in the year let all your males come before the Lord your God in the place named by him; at the feast of unleavened bread, the feast of weeks, and the feast of tents: and they are not to come before the Lord with nothing in their hands;
17 Ref Every man is to give as he is able, in the measure of the blessing which the Lord your God has given you.