Exodus 12:2-11   2. This month shall be unto you the beginning of months: it shall be the first month of the year to you. 3. ¶Speak ye unto all the congregation of Israel, saying, In the tenth day of this month they shall take to them every man a lamb, according to the house of their fathers, a lamb for an house: 4. And if the household be too little for the lamb, let him and his neighbour next unto his house take it according to the number of the souls; every man according to his eating shall make your count for the lamb. 5. Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats: 6. And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening. 7. And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it. 8. And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it. 9. Eat not of it raw, nor sodden at all with water, but roast with fire; his head with his legs, and with the purtenance thereof. 10. And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire. 11. ¶And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the LORD's passover.

Exodus 12:43-49   43. ¶And the LORD said unto Moses and Aaron, This is the ordinance of the passover: There shall no stranger eat thereof: 44. But every man's servant that is bought for money, when thou hast circumcised him, then shall he eat thereof. 45. A foreigner and an hired servant shall not eat thereof. 46. In one house shall it be eaten; thou shalt not carry forth ought of the flesh abroad out of the house; neither shall ye break a bone thereof. 47. All the congregation of Israel shall keep it. 48. And when a stranger shall sojourn with thee, and will keep the passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: for no uncircumcised person shall eat thereof. 49. One law shall be to him that is homeborn, and unto the stranger that sojourneth among you.

Leviticus 23:5-8   5. In the fourteenth day of the first month at even is the LORD's passover. 6. And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread. 7. In the first day ye shall have an holy convocation: ye shall do no servile work therein. 8. But ye shall offer an offering made by fire unto the LORD seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.