What previous situation was Jacob referring to when he told Reuben, "unstable as water, you shall not excel, because you went up to your father’s bed; Then you defiled it— he went up to my couch.
Reuben married an Egyptian woman, which displeased Jacob.
Reuben married a Canaan woman, which displeased Jacob.
Reuben slept with Jacob's wife (Leah's maidservant).
Reuben slept with Jacob's wife (Rachel's maidservant).