And when a stranger dwells with you and wants to 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 a native of the land. For no uncircumcised person shall eat it.
Exodus 12:48
Surrounding context
12:47 All the congregation of Israel shall keep it.
12:48 And when a stranger dwells with you and wants to 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 a native of the land. For no uncircumcised person shall eat it.
12:49 One law shall be for the native-born and for the stranger who dwells among you."