(68) باب إِذَا شَكَّ فِي الْحَدَثِ
'Abbad b. Tamim reported from his uncle that a person made a complaint to the Prophet (ﷺ) that he entertained (doubt) as if something had happened to him which had rendered his ablution invalid. He (the Prophet) said:
He should not cease (to pray) unless he hears a sound or perceives a smell (of passing wind).
Reference: Sunan Abi Dawud 176
In-book reference: Book 1, Hadith 176
English translation: Book 1, Hadith 176