Hadith on Cleanliness: Wash hands when waking up and before ablution

Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “When one of you awakens from sleep, do not let him dip his hands into the vessel until he washes them three times. Verily, he does not know where his hand spent the night.

Source: Ṣaḥīḥ al-Bukhārī 160, Ṣaḥīḥ Muslim 278

Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim

عَنْ أَبِي هُرَيْرَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِذَا اسْتَيْقَظَ أَحَدُكُمْ مِنْ نَوْمِهِ فَلَا يَغْمِسْ يَدَهُ فِي الْإِنَاءِ حَتَّى يَغْسِلَهَا ثَلَاثًا فَإِنَّهُ لَا يَدْرِي أَيْنَ بَاتَتْ يَدُهُ

160 صحيح البخاري كتاب الوضوء باب الاستجمار وترا

278 صحيح مسلم كتاب الطهارة باب كراهة غمس المتوضئ وغيره يده المشكوك في نجاستها في الإناء قبل غسلها ثلاثا