according to the zohar, reuben lying down with bilhah cannot be wikt:literally true because then reuben wouldn’t have become the father of a tribe of the israelites. it says that reuben knew from prophecy that there were supposed to be only twelve tribes of israel so he moved his father’s bed from bilhah’s tent even though the shechina is there whenever married people do their religious duty to have sex with each other but by meddling reuben made the shechina leave that tent and that was reuben’s sin.