Exodus 34:21-23

King James Version

²¹ Six days thou shalt work, but on the seventh day thou shalt rest: in earing time and in harvest thou shalt rest.

²² And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.

²³ Thrice in the year shall all your menchildren appear before the Lord God, the God of Israel.