Genesis 35:26

These are the generations of Jacob. Joseph, when seventeen years of age, was pasturing the flock with his brothers while he was still a youth, along with the sons of Bilhah and the sons of Zilpah, his father’s wives. And Joseph brought back an evil report about them to their father.

These are the sons of Israel: Reuben, Simeon, Levi, Judah, Issachar, Zebulun,

“And He gave him the covenant of circumcision; and so Abraham was the father of Isaac, and circumcised him on the eighth day; and Isaac was the father of Jacob, and Jacob of the twelve patriarchs.