Exodus 6:23-30 CEB

23 Aaron married Elisheba, Amminadab's daughter and Nahshon's sister. She gave birth to Nadab, Abihu, Eleazar, and Ithamar.
24 The Korahites: Assir, Elkanah, and Abiasaph. These were the Korahite clans.
25 Aaron's son Eleazar married one of Putiel's daughters. She gave birth to Phinehas. These were the leaders of Levite households by their clans.
26 It was this same Aaron and Moses whom the LORD commanded, "Bring the Israelites out of the land of Egypt in military formation."
27 It was also this same Moses and Aaron who spoke to Pharaoh king of Egypt to bring the Israelites out of Egypt.
28 At the time the LORD spoke to Moses in the land of Egypt,
29 the LORD said to him, "I am the LORD. Tell Pharaoh, Egypt's king, everything that I've said to you."
30 But Moses replied to the LORD, "Look, I'm not a very good speaker. How is Pharaoh ever going to listen to me?"