Leviticus 23:11-16

He shall wave the sheaf before the LORD so that you may be accepted; the priest shall wave it on the day after the Sabbath. Now 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. Its 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. You 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. ‘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). You shall count fifty days to the day after the seventh Sabbath; then you shall present a new grain offering to the LORD.