Exodus 12:25-27

12:25 When you enter the land that the Lord will give to you, just as he said, you must observe this ceremony. 12:26 When your children ask you, ‘What does this ceremony mean to you?’ – 12:27 then you will say, ‘It is the sacrifice of the Lord’s Passover, when he passed over the houses of the Israelites in Egypt, when he struck Egypt and delivered our households.’” The people bowed down low to the ground,