Exodus 34:23

19 The first offspring of every womb belongs to Me, including all the firstborn males among your livestock, whether cattle or sheep.

20 You must redeem the firstborn of a donkey with a lamb; but if you do not redeem it, you are to break its neck. You must redeem all the firstborn of your sons. No one shall appear before Me empty-handed.

21 Six days you shall labor, but on the seventh day you shall rest; even in the seasons of plowing and harvesting, you must rest.

22 And you are to celebrate the Feast of Weeks with the firstfruits of the wheat harvest, and the Feast of Ingathering at the turn of the year.

23 Three times a year all your males are to appear before the Lord GOD, the God of Israel.

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

25 Do not offer the blood of a sacrifice to Me along with anything leavened, and do not let any of the sacrifice from the Passover Feast remain until morning.

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

27 The LORD also said to Moses, “Write down these words, for in accordance with these words I have made a covenant with you and with Israel.”

Read all of Exodus 34