Sforno on Exodus 4:24/ספורנו על שמות ד׳:כ״ד

1ויהי בדרך במלון, when he was on the way from the desert to Midian with his wife and children. The Torah tells of this incident after concluding the report of how G’d appointed Moses as the leader of the Jewish people.

2ויפגשהו ה', the 8th day on which he should have circumcised his son occurred [the word is derived from פגש, occurred, happened. Ed.] When the baby is circumcised the presence of the Lord, שכינה is perceived as being present waiting to induct the new member of the Jewish faith. Perhaps this is even the source of the practice to place a chair for the prophet Elijah at the circumcision ceremony.

3When the time passed without Eliezer being circumcised, the Shechinah or the angel in charge of circumcision was ready to kill Moses for having been so remiss in fulfilling this commandment.