The Lord commanded Moses and Aaron: "Tell the Israelites and the king of Egypt that I have ordered you to lead the Israelites out of Egypt."
Reuben, Jacob's first-born, had four sons: Hanoch, Pallu, Hezron, and Carmi; they were the ancestors of the clans that bear their names.
Simeon had six sons: Jemuel, Jamin, Ohad, Jachin, Zohar, and Shaul, the son of a Canaanite woman; they were the ancestors of the clans that bear their names.
Levi had three sons: Gershon, Kohath, and Merari; they were the ancestors of the clans that bear their names. Levi lived 137 years. 1
References for Exodus 6:16
Gershon had two sons: Libni and Shimei, and they had many descendants.
Kohath had four sons: Amram, Izhar, Hebron, and Uzziel. Kohath lived 133 years.
Merari had two sons: Mahli and Mushi. These are the clans of Levi with their descendants.
Amram married his father's sister Jochebed, who bore him Aaron and Moses. Amram lived 137 years.
Izhar had three sons: Korah, Nepheg, and Zichri.
Uzziel also had three sons: Mishael, Elzaphan, and Sithri.
Aaron married Elisheba, the daughter of Amminadab and sister of Nahshon; she bore him Nadab, Abihu, Eleazar, and Ithamar.
Korah had three sons: Assir, Elkanah, and Abiasaph; they were the ancestors of the divisions of the clan of Korah.
Eleazar, Aaron's son, married one of Putiel's daughters, who bore him Phinehas. These were the heads of the families and the clans of the tribe of Levi.
Aaron and Moses were the ones to whom the Lord said, "Lead the tribes of Israel out of Egypt."
They were the men who told the king of Egypt to free the Israelites.