Bible Apocrypha Talmud Quran Hadith Zohar

Testament of Jacob — Chapter 3

1 Jacob said to Reuben his firstborn: Reuben, you are my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power.
2 Unstable as water, you shall not excel, because you went up to your father's bed.