Exodus 12:43-51, 13:3-10
43 And the Lord said to Moses and Aaron, “This is the statute of the Passover: no foreigner shall eat of it, 44 but every slave that is bought for money may eat of it after you have circumcised him. 45 No foreigner or hired worker may eat of it. 46 It shall be eaten in one house; you shall not take any of the flesh outside the house, and you shall not break any of its bones. 47 All the congregation of Israel shall keep it. 48 If a stranger shall sojourn with you and would keep the Passover to the Lord, let all his males be circumcised. Then he may come near and keep it; he shall be as a native of the land. But no uncircumcised person shall eat of it. 49 There shall be one law for the native and for the stranger who sojourns among you.”
50 All the people of Israel did just as the Lord commanded Moses and Aaron. 51 And on that very day the Lord brought the people of Israel out of the land of Egypt by their hosts.
13:3 Then Moses said to the people, “Remember this day in which you came out from Egypt, out of the house of slavery, for by a strong hand the Lord brought you out from this place. No leavened bread shall be eaten. 4 Today, in the month of Abib, you are going out. 5 And when the Lord brings you into the land of the Canaanites, the Hittites, the Amorites, the Hivites, and the Jebusites, which he swore to your fathers to give you, a land flowing with milk and honey, you shall keep this service in this month. 6 Seven days you shall eat unleavened bread, and on the seventh day there shall be a feast to the Lord. 7 Unleavened bread shall be eaten for seven days; no leavened bread shall be seen with you, and no leaven shall be seen with you in all your territory. 8 You shall tell your son on that day, ‘It is because of what the Lord did for me when I came out of Egypt.’ 9 And it shall be to you as a sign on your hand and as a memorial between your eyes, that the law of the Lord may be in your mouth. For with a strong hand the Lord has brought you out of Egypt. 10 You shall therefore keep this statute at its appointed time from year to year.