Exodus 34:19

15 Do not make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to them, they will invite you, and you will eat their sacrifices.

16 And when you take some of their daughters as brides for your sons, their daughters will prostitute themselves to their gods and cause your sons to do the same.

17 You shall make no molten gods for yourselves.

18 You are to keep the Feast of Unleavened Bread. For seven days at the appointed time in the month of Abib, you are to eat unleavened bread as I commanded you. For in the month of Abib you came out of Egypt.

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.

Read all of Exodus 34