Exodus 23:16
And the feast of the harvest of the firstfruits of thy work, whatsoever thou hast sown in the field. The feast also in the end of the year, when thou hast gathered in all thy corn out of the field.

Exodus 34:22
Thou shalt keep the feast of weeks with the firstfruits of the corn of thy wheat harvest, and the feast when the time of the year returneth that all things are laid in.

Leviticus 23:23
And the Lord spoke to Moses, saying:

Leviticus 23:24
Say to the children of Israel: The seventh month, on the first day of the month, you shall keep a sabbath, a memorial, with the sound of trumpets, and it shall be called holy.

Numbers 28:26
The day also of firstfruits, when after the weeks are accomplished, you shall offer new fruits to the Lord, shall be venerable and holy: you shall do no servile work therein.

Numbers 29:2
And you shall offer a holocaust for a most sweet odour to the Lord, one calf of the herd, one ram and seven lambs of a year old, without blemish.

Numbers 29:12
And on the fifteenth day of the seventh month, which shall be unto you holy and venerable, you shall do no servile work, but shall celebrate a solemnity to the Lord seven days.