Sahih Bukhari | Volume 1 | Hadith Number 369
Narrated by 'Aisha
The Prophet prayed in a Khamisa (a square garment) having marks. During the prayer, he looked at its marks. So when he finished the prayer he said, "Take this Khamisa of mine to Abu Jahm and get me his Inbijaniya (a woollen garment without marks) as it (the Khamisa) has diverted my attention from the prayer."