Exodus 12:48 in the World English Bible
When a stranger lives as a foreigner with you, and would like to keep the Passover to the LORD, let all his males be circumcised, and then let him come near and keep it. He shall be as one who is born in the land; but no uncircumcised person shall eat of it.
Context
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.