4 And Moses answered and said, But, behold, they will not believe me, nor hearken unto my voice: for they will say, The Lord hath not appeared unto thee.

⁸ And it shall come to pass, if they will not believe thee, neither hearken to the voice of the first sign, that they will believe the voice of the latter sign.

³¹ And the people believed: and when they heard that the Lord had visited the children of Israel, and that he had looked upon their affliction, then they bowed their heads and worshipped.

¹² 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?

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