Leviticus 23:13-15
New Revised Standard Version Catholic Edition
13 And the grain offering with it shall be two-tenths of an ephah of choice flour mixed with oil, an offering by fire of pleasing odor to the Lord; and the drink offering with it shall be of wine, one-fourth of a hin. 14 You shall eat no bread or parched grain or fresh ears until that very day, until you have brought the offering of your God: it is a statute forever throughout your generations in all your settlements.
The Festival of Weeks
15 And from the day after the sabbath, from the day on which you bring the sheaf of the elevation offering, you shall count off seven weeks; they shall be complete.
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