Narrated Abu Huraira (rad):

Allah’s Messenger (ﷺ) said: “If one of you feels disturbance in his stomach and doubts whether he has released some wind or not, then he should not leave the mosque unless he hears its sound or smells (its) odour”. [Reported by Muslim].

وَعَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ إِذَا وَجَدَ أَحَدُكُمْ فِي بَطْنِهِ شَيْئًا, فَأَشْكَلَ عَلَيْهِ: أَخَرَجَ مِنْهُ شَيْءٌ, أَمْ لَا? فَلَا يَخْرُجَنَّ مِنْ اَلْمَسْجِدِ حَتَّى يَسْمَعَ صَوْتًا, أَوْ يَجِدَ رِيحًا } أَخْرَجَهُ مُسْلِم ٌ [1]‏ .‏