And Moses spoke 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?
All Commentaries on Exodus 6:12 Go To Exodus 6
Richard Challoner
AD 1781
Uncircumcised lips: So he calls the defect he had in his words, or utterance.