"Anas (Allah be pleased with him) reported that Allah's Messenger (may peace be upon him) set out on an expedition to Khaibar and we observed our morning prayer in early hours of the dawn. The Apostle of Allah (may peace be upon him) then mounted and so did Abu Talha ride, and I was seating myself behind Abu Talha. Allah's Apostle (may peace be upon him) moved in the narrow street of Khaibar (and we rode so close to each other in the street) that my knee touched the leg of Allah's Apostle (may peace be upon him). (A part of the) lower garment of Allah's Apostle (may peace be upon him) slipped from his leg and I could see the whiteness of the leg of Allah's Apostle (may peace be upon him). As he entered the habitation he called: Allah-o-Akbar (Allah is the Greatest)..."