Exodus 4:24-26 literally reads: “Now it came about on the road at the lodging place that Jehovah [that is, Jehovah’s angel] got to meet him and kept looking for a way to put him to death.

It being, not Moses, but his son who was uncircumcised, the boy’s life was evidently the one threatened by Jehovah’s angel. Then, too, Moses had received a divine commission from God through his angel to lead the Israelites out of Egypt. (Ex. 3:10) So it does not seem reasonable to conclude that Moses himself would be threatened with death by an angel of God while Moses was on his way to fulfill that commission.

It was the angel of Jehovah that had the power from God to kill Moses’ son for not being in accord with the covenant of circumcision.