Deuteronomy 16:9-12 - The Festival Of Weeks

⁹ You shall count for yourselves seven weeks: from the time you begin to put the sickle to the standing grain you shall begin to number seven weeks. ¹⁰ You shall keep the feast of weeks to Yahweh your God with a tribute of a freewill offering of your hand, which you shall give, according as Yahweh your God blesses you: ¹¹ and you shall rejoice before Yahweh your God, you, and your son, and your daughter, and your male servant, and your female servant, and the Levite who is within your gates, and the foreigner, and the fatherless, and the widow, who are in the midst of you, in the place which Yahweh your God shall choose, to cause his name to dwell there. ¹² You shall remember that you were a bondservant in Egypt: and you shall observe and do these statutes.