Moses
Genesis 35:22ESV·traditional attribution

While Israel lived in that land, Reuben went and lay with Bilhah his father’s concubine. And Israel heard of it. Now the sons of Jacob were twelve.

John Calvin Reformed @genevareformer

22. Reuben went and lay with Bilhah. A sad and even tragic history is now related concerning the incestuous intercourse of Reuben with his mother-in-law. Moses, indeed, calls Bilhah Jacob’s concubine: but though she had not come into the hands of her husband, as the mistress of the family and a partaker of his goods; yet, as it respected the bed, she was his lawful...

Matthew Henry Presbyterian @wholebiblehenry

Here is, 1. Jacob's removal, Gen 35:21. He also, as his fathers, sojourned in the land of promise as in a strange country, and was not long in a place. Immediately after the story of Rachel's death he is here called Israel (Gen 35:21, Gen 35:22), and not often so afterwards: the Jews say, "The historian does him this honour here because he bore that...

Commenting on Genesis 35:21-29

John Gill Reformed Baptist @doctorgill

The sons of Leah,.... Jacob's first wife, which are six, and are reckoned in order, according to their birth, Reuben, Simeon, Levi, Judah, Issachar, Zebulun. The sons of Leah,.... Jacob's first wife, which are six, and are reckoned in order, according to their birth, Reuben, Simeon, Levi, Judah, Issachar, Zebulun. Genesis 35:24 gen 35:24 gen 35:24 gen 35:24The sons of Rachel,....