But Moses said to the LORD, “Behold, the people of Israel have not listened to me. How then shall Pharaoh listen to me, for I am of uncircumcised lips?”
Here, I. God sends Moses the second time to Pharaoh (Exo 6:11) upon the same errand as before, to command him, at his peril, that he let the children of Israel go. Note, God repeats his precepts before he begins his punishments.
Commenting on Exodus 6:10-13
And the Lord spake unto Moses and unto Aaron,.... No notice is taken of the objection of Moses, having been sufficiently answered before, and Aaron is joined with him in the following charge: and gave them a charge unto the children of Israel, and unto Pharaoh king of Egypt; that is, to go to the children of Israel and comfort them, and direct them what...
how then shall . . . who am of uncircumcised lips?--A metaphorical expression among the Hebrews, who, taught to look on the circumcision of any part as denoting perfection, signified its deficiency or unsuitableness by uncircumcision. The words here express how painfully Moses felt his want of utterance or persuasive oratory.