Exodus 34:18-28

18"You shall keep the Feast of Unleavened Bread. Seven days you shall eat unleavened bread, as I commanded you, at the time appointed in the month Abib, for in the month Abib you came out from Egypt.

19All that open the womb are mine, all your male livestock, the firstborn of cow and sheep.

20The firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. All the firstborn of your sons you shall redeem. And none shall appear before me empty-handed.

21"Six days you shall work, but on the seventh day you shall rest. In plowing time and in harvest you shall rest.

22You shall observe the Feast of Weeks, the firstfruits of wheat harvest, and the Feast of Ingathering at the year's end.

23Three times in the year shall all your males appear before the Lord God, the God of Israel.

24For I will cast out nations before you and enlarge your borders; no one shall covet your land, when you go up to appear before the Lord your God three times in the year.

25"You shall not offer the blood of my sacrifice with anything leavened, or let the sacrifice of the Feast of the Passover remain until the morning.

26The best of the firstfruits of your ground you shall bring to the house of the Lord your God. You shall not boil a young goat in its mother's milk."

27And the Lord said to Moses, "Write these words, for in accordance with these words I have made a covenant with you and with Israel."

28So he was there with the Lord forty days and forty nights. He neither ate bread nor drank water. And he wrote on the tablets the words of the covenant, the Ten Commandments.