Leviticus 23:13-16

¹³And its meat-offering two tenth portions of fine flour mingled with oil: it is a sacrifice to the Lord, a smell of sweet savour to the Lord, and its drink-offering the fourth part of a hin of wine.

¹⁴And ye shall not eat bread, or the new parched corn, until this same day, until ye offer the sacrifices to your God: it is a perpetual statute throughout your generations in all your dwellings.

¹⁵And ye shall number to yourselves from the day after the sabbath, from the day on which ye shall offer the sheaf of the heave-offering, seven full weeks:

¹⁶until the morrow after the last week ye shall number fifty days, and shall bring a new meat-offering to the Lord.