Mishkat al-Masabih
Mishkat al-Masabih 315
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
Muʿāwiya ibn Abī Sufyān reported that the Prophet said: ‘The eyes are the tether of the anus; when the eye sleeps, the tether is loosened.’ Al-Dārimī transmitted it.
Translation notes
The accompanying grading labels this report ḥasan li-ghayrihi (good through supporting reports). The Arabic is metaphorical: sleep loosens the ‘tether,’ alluding to the loss of awareness of what may invalidate ablution.