And when he was living in that region, Reuben went out, and he slept with Bilhah the concubine of his father, which was not such a small matter as to be hidden from him. Now the sons of Jacob were twelve.
Also, there were the sons of Reuben, the firstborn of Israel. For indeed, he was his firstborn, but when he had violated the bed of his father, his right as firstborn was given to the sons of Joseph, the son of Israel, and he was not reputed as firstborn.
Whoever will have slept with his stepmother, or will have uncovered the shame of his father, they shall both die a death. So let their blood be upon them.
They grind the heads of the poor into the dust of the earth, and they divert the way of the humble. And the son, as well as his father, have gone to the same girl, so that they outrage my holy name.
Above all else, it is being said that there is fornication among you, even fornication of a such kind that is not among the Gentiles, so that someone would have the wife of his father.