Charles Ellicott Commentary Numbers 12:2

"And they said, Hath Jehovah indeed spoken only with Moses? hath he not spoken also with us? And Jehovah heard it." — Numbers 12:2 (ASV)

Has the Lord indeed spoken only by Moses?—There is probably a reference in these words to the facts related in Exodus 4:10-16, where Moses speaks of his own slowness of speech (Numbers 12:10), and where it is said of Aaron, “And he shall be your spokesman to the people” (Numbers 12:16). Miriam also is spoken of in Exodus 15:20 as “the prophetess.” “Such is the depravity of human nature,” writes Calvin, “that they not only abuse the gifts of God towards the brother whom they despise, but by an ungodly and sacrilegious glorification extol the gifts themselves in such a manner as to hide the Author of the gifts.”