The Holy Prophet(sa) was very careful to safeguard against possible misunderstandings. On one occasion his wife Safiyya(ra) came to see him in the mosque. When the time came for her to return home it had become dark and the Prophet(sa) decided to escort her to her house. On the way he passed by two men and, wishing to avoid any speculation on their part as to his companion, he stopped them and lifting the veil from the face of his wife said: "See, this is Safiyya(ra) my wife." They protested saying: "O Messenger of Allah(sa)! why did you imagine that we should fall into any misconception regarding you?" The Prophet(sa) replied "Satan (i.e., evil thoughts) often courses through a man's blood. I was afraid lest your faith be affected" (Bukhari, Abwabul I’tikaf)