ENOfficial
‘Abdallah b. Mas‘ud said that they used to pray with God’s messenger without performing ablution because of anything they had trodden on. Tirmidhi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: كُنَّا نُصَلِّي مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَلَا نَتَوَضَّأ من الموطئ. رَوَاهُ التِّرْمِذِيّ
sunnah.com