(26) باب الدَّلِيلِ عَلَى أَنَّ مَنْ تَيَقَّنَ الطَّهَارَةَ ثُمَّ شَكَّ فِي الْحَدَثِ فَلَهُ أَنْ يُصَلِّيَ بِطَهَارَتِهِ تِلْكَ
Abu Huraira 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.
Reference: Sahih Muslim 362
In-book reference: Book 3, Hadith 126
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 703