26 These are that Aaron and Moses, to whom the Lord said, Bring out the children of Israel from the land of Egypt according to their armies. 

27 These are they which spake to Pharaoh king of Egypt, to bring out the children of Israel from Egypt: these are that Moses and Aaron.

These are interesting verses, lauding the accomplishments of Moses and Aaron at the conclusion of giving their ancestry. The fact that it is tying Moses and Aaron to the events that we were already in the middle of reading is strong evidence that this whole genealogy sequence was actually a separate passage that was inserted in the middle of the other account. The record of Moses seems to be a patchwork of many different tellings all combined together, sometimes in haphazard ways.

One other thing that stands out to me is that the two men are first listed as “Aaron and Moses” and secondly as “Moses and Aaron.” This seems to emphasize their inseparable nature. There is no Moses rescuing captive Israel without Aaron, just as there is no Aaron performing the priestly rituals in the wilderness without Moses. Moses may have been the one God spoke directly to, but in their duty both men were equally yoked. They pulled together as one.