Chapter: Evidence that if a person is certain that he is in a state of purity, then he doubts whether he has committed hadith (broken his wudu’), then he prays with his purity like that
'Abbad bin Tamim reported from his uncle that a person made a complaint to the Apostle (ﷺ) that he entertained (doubt) as if something had happened to him breaking his ablution. He (the Holy Prophet) said: He should not return (from prayer) unless he hears a sound or perceives a smell (of passing wind). Abu Bakr (RA) and Zuhair bin Harb have pointed out in their narrations that it was 'Abdullah bin Zaid.
Abu Hurairah (RA) reported: The Messenger of Allah (ﷺ) said: If any one of you has pain in his abdomen, but is doubtful whether or not anything has issued from him, be should not leave the mosque unless he hears a sound or perceives a smell.