Mishkat al-Masabih

Mishkat al-Masabih 315

Circumstances which make ablution necessary - Section 2
Arabic hadith text
وَعَن مُعَاوِيَة بن أبي سُفْيَان أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: قَالَ: «إِنَّمَا الْعَيْنَانِ وِكَاءُ السَّهِ فَإِذَا نَامَتِ الْعَيْنُ اسْتطْلقَ الوكاء» . رَوَاهُ الدِّرَامِي
Translation

Mu'awiya b. Abu Sufyan reported the Prophet as saying, “The eyes are the leather strap of the anus, and when the eye sleeps the leather strap is loosened.” Darimi transmitted it.