The Messenger of Allah ﷺ said: The eyes are the leather strap of the anus, so one who sleeps should perform ablution.
قَالَ رَسُولُ اللَّهِ ﷺ وِكَاءُ السَّهِ الْعَيْنَانِ فَمَنْ نَامَ فَلْيَتَوَضَّأْ
The Messenger of Allah said: "The eye is the leather strap (that ties up) the anus, so whoever falls asleep, let him perform ablution."
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْعَيْنُ وِكَاءُ السَّهِ فَمَنْ نَامَ فَلْيَتَوَضَّأْ
ʿThe anus, for the eye [in another version of this report, it says, ʿThe eye, for the anus…’ which sounds more apt], is like the string that ties up a waterskin; whoever goes to sleep, let him do wudoo’.”
عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ السَّهَ وِكَاءُ الْعَيْنِ فَمَنْ نَامَ فَلْيَتَوَضَّأْ
ʿThe anus, for the eye [in another version of this report, it says, ʿThe eye, for the anus…’ which sounds more apt], is like the string that ties up a waterskin; whoever goes to sleep, let him do wudoo’.” (Using translation from Aḥmad 887)
عَنْ رَسُولِ اللهِ ﷺ قَالَ إِنَّمَا الْعَيْنُ وِكَاءُ السَّهِ فَمَنْ نَامَ فَلْيَتَوَضَّأْ
Request/Fix translation
"وكَاءُ السَّهِ الْعَينَانِ، فَمْنَ نَامَ فَلْيَتَوَضَّأ".
Request/Fix translation
"العَينُ وكَاءُ السَّه، فمن نام فَلْيَتَوضَّأ ".