Exodus 6:29-30

Wycliffe Bible

²⁹ And the Lord spake to Moses, and said, I am the Lord; speak thou to Pharaoh, king of Egypt, all things which I speak to thee. (Yea, the Lord spoke to Moses, and said, I am the Lord; tell Pharaoh, the king of Egypt, all the things that I say to thee.)

³⁰ And Moses said before the Lord, Lo! I am uncircumcised in lips; how shall Pharaoh hear me? (Lo! I am such a poor speaker! how will Pharaoh listen to me?)