Exodus 4:12
Ver. 12. Now therefore go, and I will be with thy mouth,.... And put words into it, and cause it to speak readily and powerfully; and so it appears that he was mighty in words, as well as in deeds, Ac 7:22:
and teach thee what thou shalt say; to Pharaoh, to the Israelites, and to Aaron, that was to speak for him, as is hereafter observed.