So the LORD let him alone. (When she said, “bridegroom of blood,” she was referring to the circumcision.)
Moses neglected to circumcise his son, likely because he was too fond of his Midianite wife and too indulgent of her will, and so God met him in anger to kill him. Omissions are sins; the neglect of the covenant's seals shows we undervalue the promises and despise the conditions. Even good men grow slack in duty when cut off from the company of the faithful.
AI summary
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.