Maliks Muwatta Book 3, Hadith Number 72.
Section : Looking in the Prayer at What Distracts You from It.
Yahya related to me from Malik from AIqama ibn Abi AIqama from his mother that A’isha, the wife of the Prophet, may Allah bless him and grant him peace, said, “Abu Jahm ibn Hudhayfa gave the Messenger of Allah, may Allah bless him and grant him peace, a fine striped garment from Syria and he did the prayer in it. When he had finished he said, ‘Give this garment back to Abu Jahm. I looked at its stripes in the prayer and they almost distracted me.'”