Leviticus 23:9-16

9Then the Lord spoke to Moses, saying, 10“Speak to the sons of Israel and say to them, ‘When you enter the land which I am going to give to you and you 1gather its harvest, then you shall bring in the sheaf of the first fruits of your harvest to the priest. 11He shall wave the sheaf before the Lord for you to be accepted; on the day after the Sabbath the priest shall wave it. 12Now on the day when you wave the sheaf, you shall offer a male lamb one year old without defect as a burnt offering to the Lord. 13Its 2grain offering shall then be 3two-tenths of an ephah of fine flour mixed with oil, an offering by fire to the Lord for a soothing aroma, with its drink offering, a 4fourth of a hin of wine. 14Until this very day, until you have brought in the offering of your God, 5you shall eat neither bread nor roasted grain nor new produce. It is to be a permanent statute throughout your generations in all your dwelling places.

15‘6You shall also count for yourselves from the day after the Sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete Sabbaths. 16You shall count fifty days to the day after the seventh Sabbath; then you shall present a 7new grain offering to the Lord.