Imam Ahmad : 10386

وَلَقَدْ رَأَيْتُ مُحَمَّدًا صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي وَعَلَيْهِ نَعْلَاهُ وَيَنْصَرِفُ وَهُمَا عَلَيْهِ

Thru di same line a transmission as di previous hadith fram [Abu Hurairah] 'An indeed mi have seen Muhammad sallallaahu alaihi wasallam praying wearing sandals, an him walk weh while him did still a wearing both sandals'.