Exodus 6:30 in the World English Bible
Moses said before the LORD, “Behold, I am of uncircumcised lips, and how shall Pharaoh listen to me?”
Context
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?