Exodus 6:12

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?”

13The LORD spoke to Moses and to Aaron, and gave them a command to the children of Israel, and to Pharaoh king of Egypt, to bring the children of Israel out of the land of Egypt.

14These are the heads of their fathers’ houses. The sons of Reuben the firstborn of Israel: Hanoch, and Pallu, Hezron, and Carmi; these are the families of Reuben.