Deuteronomy 16:9-12 - The Festival Of Weeks

⁹ “You shall count seven weeks for yourself; you shall begin to count seven weeks from the time you first put the sickle to the standing grain. ¹⁰ Then you shall celebrate the Feast of Weeks to the Lord your God with a tribute of a freewill offering from your hand, which you shall give [to Him] just as the Lord your God blesses you; ¹¹ and you shall rejoice before the Lord your God, you and your son and your daughter and your male and female servants and the Levite who is within your [city] gates, and the stranger and the orphan and the widow who are among you, at the place where the Lord your God chooses to establish His Name (Presence). ¹² You shall remember that you were a slave in Egypt, and you shall be careful to obey these statutes.