Leviticus 23:16
even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meal-offering unto Jehovah.
Acts 2:1
And when the day of Pentecost was now come, they were all together in one place.
Numbers 28:26
Also in the day of the first-fruits, when ye offer a new meal-offering unto Jehovah in your feast of weeks, ye shall have a holy convocation; ye shall do no servile work;
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