Exodus 6:12
12 But Moses said to the Lord, “Behold, the people of Israel have tnot listened to me. How then shall Pharaoh listen to me, for uI am of uncircumcised lips?”
Acts 7:51
51 d“You stiff-necked people, euncircumcised in heart and ears, you always resist the Holy Spirit. fAs your fathers did, so do you.