Exodus 12:25-27

YLT(i) 25 and it hath been, when ye come in unto the land which Jehovah giveth to you, as He hath spoken, that ye have kept this service; 26 and it hath come to pass when your sons say unto you, What is this service ye have? 27 that ye have said, A sacrifice of passover it is to Jehovah, who passed over the houses of the sons of Israel in Egypt, in His smiting the Egyptians, and our houses He delivered.'