Sahih Bukhari Volume 7, Book 72, Hadith Number 697.

Narrated By ‘Abdullah bin ‘Umar : The Prophet said, “A Muhrim should not wear a shirt, a turban, trousers, hooded cloaks, a garment touched with (perfumes) of saffron or wars, or Khuffs except if one has no sandals in which case he should cut short the Khuffs below the ankles.”