“And Moses said before the LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me?”
Exodus 6:30 (KJV)
Context Reading
28And it came to pass on the day when the LORD spake unto Moses in the land of Egypt, 29That the LORD spake unto Moses, saying, I am the LORD: speak thou unto Pharaoh king of Egypt all that I say unto thee. 30And Moses said before the LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me?