Narrated `Abbas bin Tamim: My uncle asked Allah's Apostle about a person who imagined to have passed wind during the prayer. Allah' Apostle replied: "He should not leave his prayers unless he hears sound or smells something."
Hadith ReferenceSahih Bukhari / The Book of Wudu (Ablution) / Hadith: 137
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة