'Passover sacrifice' in the Bible

And Moses called all the elders of Israel, and he said to them, "Select and take for yourselves sheep for your clans and slaughter the Passover sacrifice.

you will say, 'It [is] a Passover sacrifice for Yahweh, who passed over the houses of the {Israelites} in Egypt when he struck Egypt; and he delivered our houses.'" And the people knelt down and they worshiped.