Exodus 12:46

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.