The Reasons for the Morning Hand Washing

We find in our sources four different reasons for the obligation to wash one's hands upon waking in the morning. The Rosh (Rabbenu Asher Ben Yehiel, 1250-1327) writes that the Sages required washing one's hands in the morning because they likely touched the private parts during the night. As the hands became dirty during the night, they must be washed in the morning. The Rashba (Rav Shlomo Ben…