Deuteronomy 16:2-4 New American Bible (Revised Edition) (NABRE)
2 You shall offer the Passover sacrifice from your flock and your herd to the Lord, your God, in the place the Lord will choose as the dwelling place of his name. 3 You shall not eat leavened bread with it. For seven days you shall eat with it only unleavened bread, the bread of affliction, so that you may remember as long as you live the day you left the land of Egypt; for in hurried flight you left the land of Egypt. 4 No leaven is to be found with you in all your territory for seven days, and none of the meat which you sacrificed on the evening of the first day shall be kept overnight for the next day.