Exodus 34:17-19 Common English Bible (CEB)
17 Don’t make metal gods for yourself.
18 Observe the Festival of Unleavened Bread. You should eat unleavened bread for seven days, as I commanded you, at the set time in the month of Abib,[a] because it was in the month of Abib that you came out of Egypt.
19 Every first offspring is mine. That includes all your male livestock, the oldest offspring of cows and sheep.