Not graded
Bulugh al-Maram 205
Allah's Messenger (ﷺ) said: "When one of you releases air (through his anus) during Salat (prayer), he should break the Salat (prayer) then perform ablution and repeat the prayer." [Reported by al-Khamsah and Ibn Hibban graded it Sahih (authentic)].
عَنْ عَلِيِّ بْنِ طَلْقٍ - رضى الله عنه - قَالَ : قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ إِذَا فَسَا أَحَدُكُمْ فِي اَلصَّلَاةِ فَلْيَنْصَرِفْ , وَلْيَتَوَضَّأْ , وَلْيُعِدْ اَلصَّلَاةَ } رَوَاهُ…