Exodus 6:10

8I will bring you into the land which I swore to give to Abraham, to Isaac, and to Jacob; and I will give it to you for a heritage: I am the LORD.’”

9Moses spoke so to the children of Israel, but they didn’t listen to Moses for anguish of spirit, and for cruel bondage.

10The LORD spoke to Moses, saying,

11“Go in, speak to Pharaoh king of Egypt, that he let the children of Israel go out of his land.”

12Moses spoke before the LORD, saying, “Behold, the children of Israel haven’t listened to me. How then shall Pharaoh listen to me, when I have uncircumcised lips?”