Deuteronomy 16:10-11

Then keep the feast of weeks to the Lord your God, with an offering freely given to him from the wealth he has given you: Then you are to be glad before the Lord your God, you and your son and your daughter, your man-servant and your woman-servant, and the Levite who is with you, and the man from a strange country, and the child without a father, and the widow, who are living among you, in the place marked out by the Lord your God as a resting-place for his name.