6:8. And brought you into the land, concerning which I lifted up my hand to give it to Abraham, Isaac, and Jacob: and I will give it you to possess: I am the Lord.
6:9. And Moses told all this to the children of Israel: but they did not hearken to him, for anguish of spirit, and most painful work.
6:10. And the Lord spoke to Moses, saying:
6:11. Go in, and speak to Pharao king of Egypt, that he let the children of Israel go out of his land.
6:12. Moses answered before the Lord: Behold the children of Israel do not hearken to me: and how will Pharao hear me, especially as I am of uncircumcised lips?
Uncircumcised lips... So he calls the defect he had in his words, or utterance.
6:13. And the Lord spoke to Moses and Aaron, and he gave them a charge unto the children of Israel, and unto Pharao the king of Egypt, that they should bring forth the children of Israel out of the land of Egypt.
6:14. These are the heads of their houses by their families. The sons of Ruben the firstborn of Israel: Henoch and Phallu, Hesron and Charmi.
6:15. These are the kindreds of Ruben. The sons of Simeon, Jamuel and Jamin, and Ahod, and Jachin, and Soar, and Saul the son of a Chanaanitess: these are the families of Simeon.
6:16. And these are the names of the sons of Levi by their kindreds: Gerson, and Caath, and Merari. And the years of the life of Levi were a hundred and thirty-seven.