Exodus 12:26-28

Young's Literal Translation

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.'

²⁸ And the people bow and do obeisance, and the sons of Israel go and do as Jehovah commanded Moses and Aaron; so have they done.