While Israel was living in that area, Reuben went in and slept with Bilhah. She was the concubine of Reuben’s father. And Israel heard about it. Here are the 12 sons Jacob had.
These were the children and grandchildren born to Jacob and Zilpah. Laban had given Zilpah to his daughter Leah. The total number of people in the family line of Jacob and Zilpah was 16.