Riyad as-Salihin 1849
Safiyyah bint Huyai (May Allah be pleased with her), the Mother of the Believers, said:
I came to visit the Prophet (ﷺ) while he was in the state of I'tikaf [(seclusion) in the mosque during the last ten days of Ramadan]. After having talked to him, I got up to return. The Prophet (ﷺ) also got up with me and accompanied me a part of the way. At that moment two Ansari man passed by. When they saw him they quickened their pace. The Prophet (ﷺ) said to them, "Do not hurry. She is Safiyyah, daughter of Huyai, my wife." They said: "Subhan Allah (Allah is free from imperfection)! O Messenger of Allah! (You are far away from any suspicion)." The Messenger of Allah (ﷺ) said, "Satan circulates in a person like blood (in the blood streams). I apprehended lest Satan should drop some evil thoughts in your minds." [Al-Bukhari and Muslim] .
وعن أم المؤمنين صفية بن حيي رضي الله عنها قالت‏:‏ كان النبي صلى الله عليه وسلم  معتكفاً، فأتيته أزوره ليلاً، فحدثته ثم قمت لأنقلب، فقام معي ليقلبني، فمر رجلان من الأنصار رضي الله عنهما ، فلما رأيا النبي صلى الله عليه وسلم  أسرعا، فقال صلى الله عليه وسلم ‏:‏ على رسلكما إنها صفية بنت حيي فقالا‏:‏ سبحان الله يا رسول الله‏!‏ ‏:‏‏"‏إن الشيطان يجري من ابن آدم مجرى الدم، وإني خشيت أن يقذف في قلوبكما شراً أو قال‏:‏ شيئاً” ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏