While Israel was living in that region, Reuben went in and slept with his father’s concubine Bilhah, and Israel heard about it. Jacob had twelve sons:
KJV
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:
ASV
And it came to pass, while Israel dwelt in that land, that Reuben went and lay with Bilhah his father’s concubine: and Israel heard of it.Now the sons of Jacob were twelve: