My uncle said: The Prophet (ﷺ) said, "One should not leave his prayer unless he hears sound or smells something."
Sahih al-Bukhari Book 4, Hadith 43
← Previous Hadith Allah's Messenger (ﷺ) said, "A person is considered in prayer as long as he is waiting for the prayer in the mosque as long as he does not do Hadath." A non-Arab man asked, "O Abu Huraira! What is Hadath?" I replied, "It is the passing of wind (from the anus) (that is one of the types of Hadath).

Sahih al-Bukhari Book 4, Hadith 42 Next Hadith → I used to get emotional urethral discharges frequently and felt shy to ask Allah's Messenger (ﷺ) about it. So I requested Al-Miqdad bin Al-Aswad to ask (the Prophet (ﷺ) ) about it. Al-Miqdad asked him and he replied, "One has to perform ablution (after it)."

Sahih al-Bukhari Book 4, Hadith 44