Exodus 12:48 KJV
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.
Exodus 12:48, King James Version
In 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.