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‘A’isha reported the Prophet (ﷺ) as saying, “If any of you breaks wind during prayer he should hold his nose and withdraw.” Abu Dawud transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا أَنَّهَا قَالَتْ: قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا أحدث أدكم فِي صَلَاتِهِ فَلْيَأْخُذْ بِأَنْفِهِ ثُمَّ لِيَنْصَرِفْ» . رَوَاهُ أَبُو دَاوُد
sunnah.com