Deuteronomy 16:9-11

LITV(i) 9 You shall number to yourself seven weeks. When the sickle begins to reap in the standing grain, you shall begin to number seven weeks. 10 And you shall keep the Feast of Weeks to Jehovah your God according to the measure of the freewill offering of your hand, which you shall give according as Jehovah your God blesses you. 11 And you shall rejoice before Jehovah your God, you and your son, and your daughter, and your male slave, and your slave-girl, and the Levite that is inside your gates, and the alien, and the fatherless, and the widow that are among you, in the place which Jehovah your God shall choose to cause His name to dwell there.