Genesis 49:4

Unstable as water, thou shalt not excel; he was like the bubbling of boiling water, rashly impulsive, and therefore he would lose the dignity and the preference of his birthright. Because thou wentest up to thy father's bed, in lying with Bilhah, his father's concubine, Genesis 35:22; then defiledst thou it, he desecrated what should have been sacred to him. It was a crime from which the father even now, after the lapse of so many years, turned with horror, saying, with a tinge of repulsion and bitterness; he went up to my couch.