(6) باب نواقض الوضوء
Also reported by Abu Da'ud mentioning the above addition without the words "the string is untied", but both versions are weak. (AR)
Reference (AR): Bulugh al-Maram 81 (AR)
In-book reference (AR): Book 1, Hadith 98 (AR)
English translation (AR): Book 1, Hadith 87 (AR)