887
Musnad AhmedIt was narrated from ‘Ali bin Abi Talib that
the Prophet (ﷺ) said: "The anus, for the eye [in another version of this report, it says, "The 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’.”
Reference: Musnad Ahmad 887
Arabic/English book : Book 5, Hadith 887
Arabic/English book : Book 5, Hadith 887