Parashas Vaeira · Passuk 6:26
Chabad.org — English translation + Rashi
Torah Temimah points to Megillah 11a (verified).
Sefaria — Exodus 6:26
Sefaria — Megillah 11a
E-Daf — Megillah 11a
English: “Although Moses is normally named before Aaron, here the Torah says “Aaron and Moses,” teaching that the two were considered equal in the roles described by the passage.”
On the daf / in context: See the cited source for the full section.
Talmudic interpretation of the order of Aaron and Moses
The reversal of the usual order of their names is read as teaching that Aaron and Moses were both essential to the Exodus mission, each in his assigned role.