Deuteronomy 16:2-4

Young's Literal Translation

² and thou hast sacrificed a passover to Jehovah thy God, of the flock, and of the herd, in the place which Jehovah doth choose to cause His name to tabernacle there.

³ `Thou dost not eat with it any fermented thing, seven days thou dost eat with it unleavened things, bread of affliction; for in haste thou hast come out of the land of Egypt; so that thou dost remember the day of thy coming out of the land of Egypt all days of thy life;

⁴ and there is not seen with thee leaven in all thy border seven days, and there doth not remain of the flesh which thou dost sacrifice at evening on the first day till morning.