The sons of Reuben the firstborn of Israel (he was the firstborn, but when he defiled his father’s marriage bed, his rights as firstborn were given to the sons of Joseph son of Israel; so he could not be listed in the genealogical record in accordance with his birthright,
It is actually reported that there is sexual immorality among you, and of a kind that even pagans do not tolerate: A man is sleeping with his father’s wife.
“You shall not covet your neighbor’s wife. You shall not set your desire on your neighbor’s house or land, his male or female servant, his ox or donkey, or anything that belongs to your neighbor.”
He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.