'Speaker' in the Bible

And Moses spoke before Yahweh, saying, "Look, the {Israelites} do not listen to me, and how will Pharaoh listen to me, since I [am] {a poor speaker}?"

And Moses said before Yahweh, "Look, I [am] {a poor speaker}. And how will Pharaoh listen to me?"

And they began calling Barnabas Zeus and Paul Hermes, because he was the {principal speaker}.