ʿUyūn akhbār al-Riḍā - Volume 1 > Various Traditions From al-Ridha (s)
Hadith #47

47- حَدَّثَنا أَبي‏ رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَنا سَعْدُ بْنُ عَبْدِ اللَّه قالَ: حَدَّثَنا أَحْمَدُ بْنُ مُحَمَّدِبْنِ عِيسَى، عَنْ مُحَمَّدِ بْنِ سَهْلٍ، عَنْ زَكَرِيَّا بْنِ آدَمَ قالَ: سَأَلْتُ الرِّضَا عَلَيْهِ السَّلامُ عَنِ النَّاسُورِ فَقَالَ إِنَّمَا يَنْقُضُ الْوُضُوءَ ثَلاثٌ الْبَوْلُ وَالْغَائِطُ وَالرِّيح.

30-47 (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Muhammad ibn Sahl,on the authority of Zakariya ibn Adam, “I asked Al-Ridha (s) about an anal fistula. The Imam (s) said, ‘The only things that void the ablutions are defecation, farting or pissing.’”