While Messenger of Allah ﷺ was in Iʿtikaf, I called on him at night and having had a talk with him, I got up to depart. He got up also to accompany me to my dwelling place, which was then in the house of Usama bin Zaid. Two Ansari men passed by, and when they saw the Prophet ﷺ they hastened away. The Prophet said (to them). "Don't hurry! It is Safiya, the daughter of Huyay (i.e. my wife)." They said, "Glorified be Allah! O Messenger of Allah ﷺ! (How dare we suspect you?)" He said, "Satan circulates in the human mind as blood circulates in it, and I was afraid that Satan might throw an evil thought (or something) into your hearts." (Using translation from Bukhārī 3281)
كَانَ رَسُولُ اللهِ ﷺ مُعْتَكِفًا فَأَتَيْتُهُ لَيْلًا فِي الْمَسْجِدِ فَحَدَّثْتُهُ ثُمَّ قُمْتُ فَقَامَ مَعِي لِيَقْلِبَنِي وَكَانَ مَسْكَنُهَا فِي دَارِ أُسَامَةَ بْنِ زَيْدٍ فَمَرَّ رَجُلَانِ مِنَ الْأَنْصَارِ فَلَمَّا رَأَيَا النَّبِيَّ ﷺ أَسْرَعَا فَقَالَ النَّبِيُّ ﷺ «عَلَى رِسْلِكُمَا إِنَّهَا صَفِيَّةُ بِنْتُ حُيَيٍّ» فَقَالَا سُبْحَانَ اللهِ يَا رَسُولَ اللهِ فَقَالَ «إِنَّ الشَّيْطَانَ يَجْرِي مِنِ ابْنِ آدَمَ مَجْرَى الدَّمِ وَإِنِّي خَشِيتُ أَنْ يُقْذَفَ فِي قُلُوبِكُمَا شَيْئًا» أَوْ قَالَ «شَرًّا»