وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا اسْتَيْقَظَ أَحَدُكُمْ مِنْ مَنَامه فليستنثر ثَلَاثًا فَإِن الشَّيْطَان يبيت على خيشومه»
He also reported God’s messenger as saying, “When one of you awakes from sleep and performs ablution he must clear his nose three times, for the devil spends the night in the interior of his nose.” (Bukhari and Muslim)