Exodus 34:23

²¹Six days thou shalt work, but on the seventh day thou shalt rest: there shall be rest in seedtime and harvest.

²²And thou shalt keep to me the feast of weeks, the beginning of wheat harvest; and the feast of ingathering in the middle of the year.

— Exodus 34:23 —

²⁴For when I shall have cast out the nations before thy face, and shall have enlarged thy coasts, no one shall desire thy land, whenever thou mayest go up to appear before the Lord thy God, three times in the year.

²⁵Thou shalt not offer the blood of my sacrifices with leaven, neither shall the sacrifices of the feast of the Passover remain till the morning.