Deuteronomy 6:20-23

20When thy son asketh thee in time to come, saying, What mean the testimonies, and the statutes, and the ordinances, which Jehovah our God hath commanded you? 21then thou shalt say unto thy son, We were Pharaoh’s bondmen in Egypt: and Jehovah brought us out of Egypt with a mighty hand; 22and Jehovah showed signs and wonders, great and sore, upon Egypt, upon Pharaoh, and upon all his house, before our eyes; 23and he brought us out from thence, that he might bring us in, to give us the land which he sware unto our fathers.