Leviticus 23:9-16

9Then the Lord spoke to Moses, saying,

10“Speak to the children of Israel and say to them, ‘When you enter the land which I am giving you and reap its harvest, you shall bring the sheaf of the first fruits of your harvest to the priest.

11He shall wave the sheaf before the Lord so that you may be accepted; the priest shall wave it on the day after the Sabbath.

12Now on the day when you wave the sheaf you shall offer a male lamb one year old without blemish as a burnt offering to the Lord.

13Its grain offering shall be two-tenths of an ephah of fine flour mixed with [olive] oil, an offering by fire to the Lord for a sweet and soothing aroma, with its drink offering [to be poured out], a fourth of a hin of wine.

14You shall not eat any bread or roasted grain or new growth, until this same day when you bring in the offering to your God; it is a permanent statute throughout your generations wherever you may be.

15‘You shall count from the day after the Sabbath, from the day when you brought in the sheaf (tied bundle of grain) of the wave offering; there shall be seven complete Sabbaths (seven full weeks).

16You shall count fifty days to the day after the seventh Sabbath; then you shall present a new grain offering to the Lord.