Exodus 34:21-26

21“Six days you shall labor, but on the seventh day you shall rest; even during the plowing season and harvest you must rest. 22“Celebrate the Festival of Weeks with the firstfruits of the wheat harvest, and the Festival of Ingathering at the turn of the year. That is, in the autumn 23Three times a year all your men are to appear before the Sovereign LORD, the God of Israel.

24I will drive out nations before you and enlarge your territory, and no one will covet your land when you go up three times each year to appear before the LORD your God.

25“Do not offer the blood of a sacrifice to me along with anything containing yeast, and do not let any of the sacrifice from the Passover Festival remain until morning.

26“Bring the best of the firstfruits of your soil to the house of the LORD your God. “Do not cook a young goat in its mother’s milk.”