R. Akiva to R. Eliezer: This goes without saying. What, rather, is the intent of "Moses spoke, etc."? That the Holy One Blessed be He gave power and strength to Moses and assisted him with his voice, so that Moses could speak (the commandment) to Israel in the same manner that he had heard it from Him. Thus, "Moses spoke, G–d answering (i.e., assisting) him with (the) voice."