Reference
Leviticus 23:9
“And the Lord spake unto Moses, saying,”
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In the first day ye shall have an holy convocation: ye shall do no servile work therein.
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But ye shall offer an offering made by fire unto the Lord seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.
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And the Lord spake unto Moses, saying,
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Speak unto the children of Israel, and say unto them, When ye be come into the land which I give unto you, and shall reap the harvest thereof, then ye shall bring a sheaf of the firstfruits of your harvest unto the priest:
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And he shall wave the sheaf before the Lord, to be accepted for you: on the morrow after the sabbath the priest shall wave it.
Scripture