Exodus 34:17-19 Complete Jewish Bible (CJB)
17 “Do not cast metal gods for yourselves.
18 “Keep the festival of matzah by eating matzah, as I ordered you, for seven days during the month of Aviv; for it was in the month of Aviv that you came out from Egypt.
19 “Everything that is first from the womb is mine. Of all your livestock, you are to set aside for me the males, the firstborn of cattle and flock.