Mose's wife circumcises her son to save the life of Moses:
4:25 Then Zipporah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me.
4:26 So he let him go: then she said, A bloody husband thou art, because of the circumcision.
4:27 And the LORD said to Aaron, Go into the wilderness to meet Moses. And he went, and met him in the mount of God, and kissed him.
If you ain't circumcised, you can't get to heaven:
12:43 And the LORD said unto Moses and Aaron, This is the ordinance of the passover: There shall no stranger eat thereof:
12:44 But every man's servant that is bought for money, when thou hast circumcised him, then shall he eat thereof.
12:45 A foreigner and an hired servant shall not eat thereof.
12:46 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.
12:47 All the congregation of Israel shall keep it.
12:48 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.