So the LORD let him alone. (When she said, “bridegroom of blood,” she was referring to the circumcision.)
Moses is here going to Egypt, and we are told, I. How God met him in anger, Exo 4:24-26. This is a very difficult passage of story; much has been written, and excellently written, to make it intelligible; we will try to make it improving. Here is, 1. The sin of Moses, which was neglecting to circumcise his son.
Commenting on Exodus 4:24-31
And the Lord said unto Aaron,.... He appeared to him in a dream or vision, and to this reference is had in Sa1 2:27. go into the wilderness to meet Moses; in the wilderness of Arabia, through which Moses was to pass into Egypt, and who was now set out on his journey thitherward: and he went; immediately, being obedient to the heavenly vision: and...
So he let him go--Moses recovered; but the remembrance of this critical period in his life would stimulate the Hebrew legislator to enforce a faithful attention to the rite of circumcision when it was established as a divine ordinance in Israel, and made their peculiar distinction as a people.