Exodus 12:24-27

24“Obey these instructions as a lasting ordinance for you and your descendants. 25When you enter the land that the Lord will give you as he promised, observe this ceremony. 26And when your children ask you, ‘What does this ceremony mean to you?’ 27then tell them, ‘It is the Passover sacrifice to the Lord, who passed over the houses of the Israelites in Egypt and spared our homes when he struck down the Egyptians.’ ” Then the people bowed down and worshiped.