Exodus 34:18-28

18“You shall observe the Feast of Unleavened Bread (Passover). For seven days you shall eat unleavened bread, as I have commanded you, at the appointed time in the month of Abib; for in the month of Abib you came out of Egypt.

19“All the firstborn males among your livestock belong to Me, whether cattle or sheep.

20You shall redeem the firstborn of a donkey with a lamb; but if you do not redeem it, then you shall break its neck. You shall redeem all the firstborn of your sons. None of you are to appear before Me empty-handed.

21“You shall work for six days, but on the seventh day you shall rest; [even] in plowing time and in harvest you shall rest [on the Sabbath].

22You shall observe and celebrate the Feast of Weeks (Harvest, First Fruits, or Pentecost), the first fruits of the wheat harvest, and the Feast of Ingathering (Booths or Tabernacles) at the year’s end.

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

24For I will drive out and dispossess nations before you and enlarge your borders; nor shall any man covet (actively seek for himself) your land when you go up to appear before the Lord your God three times a year.

25“You shall not offer the blood of My sacrifice with leavened bread, nor shall the sacrifice of the Feast of the Passover (Unleavened Bread) be left over until morning.

26“You shall bring the very first of the first fruits of your ground to the house of the Lord your God. “You shall not boil a young goat in his mother’s milk [as some pagans do].”

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

28Moses was there with the Lord forty days and forty nights; he ate no bread and drank no water. And he wrote on the tablets the words of the covenant, the Ten Commandments.