Sahih al-Bukhari, Volume 1, Book 8, Hadith 383 (USC-MSA) ⓘ
Narrated Abu Maslama: Sa`id bin Yazid Al-Azdi: I asked Anas bin Malik whether the Prophet had ever, prayed with his shoes on. He replied "Yes."
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنَا أَبُو مَسْلَمَةَ، سَعِيدُ بْنُ يَزِيدَ الأَزْدِيُّ قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ أَكَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي فِي نَعْلَيْهِ قَالَ نَعَمْ.
also referenced under: Book 8, Hadith 38 (In-Book) & Hadith 386 (DarusSalam)