Shavuoth's connection to the New Testament

And the Lord spoke to Moses, saying, “Speak to the children of Israel, and say to them: ‘When you come into the land which I give to you, and reap its harvest, then you shall bring a sheaf of the firstfruits of your harvest to the priest. He shall wave the sheaf before the Lord, to be accepted on your behalf; on the day after the Sabbath the priest shall wave it. And you shall offer on that day, when you wave the sheaf, a male lamb of the first year, without blemish, as a burnt offering to the Lord. Its grain offering shall be two-tenths of an ephah of fine flour mixed with oil, an offering made by fire to the Lord, for a sweet aroma; and its drink offering shall be of wine, one-fourth of a hin. You shall eat neither bread nor parched grain nor fresh grain until the same day that you have brought an offering to your God; it shall be a statute forever throughout your generations in all your dwellings.
Leviticus 23: 9-14