Exodus 12:21

Exo 12:21 Then Moses called for all the elders of Israel, and said unto them, Draw out and take you a lamb according to your families, and kill the passover.

Ver. 21. All the elders of Israel. ] The masters of families, who in this family service were to kill and eat, and set before the rest of the household, as priests at home; and to show them the meaning of that mystery.