No uncircumcised male shall eat the Passover

43 And the Lord said to Moses and Aaron, “This is the ordinance of the Passover: No foreigner shall eat it. 44 But every man’s servant who is bought for money, when you have circumcised him, then he may eat it. 45 A sojourner and a hired servant shall not eat it. 

47 “All the congregation of Israel shall keep it. 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. 49 One law shall be for the native-born and for the stranger who dwells among you.”

Exodus 12:43-45, 47-49 NKJV

Comment:

We are still partly amber on the earlier commandment to be circumcised see our discussion on the subject here.