Exodus 6:29-30
29
That the LORD spake unto Moses, saying, I am the LORD: speak thou unto Pharaoh king of Egypt all that I say unto thee.
30
And Moses said before the LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me?
Bible text: King James Version (1769 Blayney text) · Public domain