Ibn Ezra on Numbers 12:3

ענו מאד. במשקל שלו והטעם שלא בקש גדולה על אחיו: WAS VERY MEEK. The word anav²⁶From the root ayin, nun, heh. (meek) is similar to the word shalev²⁷From the root shin, lamed, heh. (at peace) (Job 16:12).²⁸Both words come from roots that end in a heh. In both words a vav has been substituted for a heh. Its meaning is that Moses did not seek honor over his brother.²⁹Contrary to what Miriam had implied in verse 2, Moses did not consider himself superior to Aaron.