But it was on the way, in the place of lodging that the angel of the Lord met him, and sought to kill him, because Gershom his son had not been circumcised, inasmuch as Jethro his father-in-law had not permitted him to circumcise him: but Eliezer had been circumcised, by an agreement between them two.
The Angel Meets Moses at the Inn Because Gershom Is Uncircumcised
Targum Pseudo-Jonathan on Exodus 4:24