Exodus 6:23-30 TMB

23 And Aaron took Elisheba, daughter of Amminadab, sister of Nahshon, for a wife; and she bore him Nadab and Abihu, Eleazar and Ithamar.
24 And the sons of Korah: Assir and Elkanah and Abiasaph; these are the families of the Korahites.
25 And Eleazar, Aaron's son, took one of the daughters of Putiel for a wife; and she bore him Phinehas; these are the heads of the fathers of the Levites according to their families.
26 These are that Aaron and Moses to whom the LORD said, "Bring out the children of Israel from the land of Egypt according to their armies."
27 These are they who spoke to Pharaoh king of Egypt to bring out the children of Israel from Egypt. These are that Moses and Aaron.
28 And it came to pass on the day when the LORD spoke unto Moses in the land of Egypt,
29 that the LORD spoke unto Moses, saying, "I am the LORD. Speak thou unto Pharaoh king of Egypt all that I say unto thee."
30 And Moses said before the LORD, "Behold, I am of uncircumcised lips, and how shall Pharaoh hearken unto me?"