مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 513
Purification
The Cleansing of Impurities - Section 3
وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: كُنَّا نُصَلِّي مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَلَا نَتَوَضَّأ من الموطئ. رَوَاهُ التِّرْمِذِيّ
‘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.
Mishkat al-Masabih, 513صَحِيح (الألباني)