Who said he had uncircumcised lips?

Moses

And Moses spake before the LORD, saying, Behold, the children of Israel have not hearkened unto me; how then shall Pharaoh hear me, who am of uncircumcised lips? Exodus 6:12

And Moses said before the LORD, Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me? Exodus 6:30