Bulugh al-Maram, Book 1, Hadith 42 (English) ⓘ
Narrated Abu Huraira (rad): Allah’s Messenger said: “When one of you wakes up from his sleep, he must blow of his nose three times, for the Satan spends the night inside one’s nostrils” [Agreed upon].
وَعَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - قَالَ: قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ إِذَا اِسْتَيْقَظَ أَحَدُكُمْ مِنْ مَنَامِهِ فَلْيَسْتَنْثِرْ ثَلَاثًا, فَإِنَّ اَلشَّيْطَانَ يَبِيتُ عَلَى خَيْشُومِهِ } مُتَّفَقٌ عَلَيْه ِ (48). 4 - صحيح. رواه البخاري (3295)، ومسلم (238).
also referenced under: Book 1, Hadith 43 (In-Book)