TSK · Genesis 46:25

And she said, Behold my maid Bilhah, go in unto her; and she shall bear upon my knees, that I may also have children by her.

And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard [it]. Now the sons of Jacob were twelve:

Reuben, Simeon, Levi, and Judah,