During the time he was living there, Reuben went and slept with Bilhah, his father's concubine, and Israel found out about it. These were the twelve sons of Jacob:
The sons of Reuben the firstborn of Israel. (Though he was the firstborn, his birthright was given to the sons of Joseph son of Israel because he had defiled his father's bed. That is why Reuben is not listed in the genealogy according to birthright,
I hear reports that sexual immorality is happening among you, immorality that even the foreigners don't practice. A man is living with his father's wife!
You must not desire to have anyone else's wife. You must not desire to have their house or field, or their male slave or female slave, or their ox or donkey, or anything that belongs to them.”
They're always on the lookout for adulterous relationships—they just can't stop sinning. They seduce the vulnerable; they have trained themselves in greed; they are offspring under a curse.
He spoke about these things, though some of what he wrote is certainly hard to understand. Some ignorant and unbalanced people have twisted what he wrote to their own loss—just as they do other scriptures.