(9) CHAPTER. To offer Salat (prayer) with a shirt, trousers, a Tubban or a Qaba (an outer garment with full length sleeves).
Narrated Abu Huraira: A man stood up and asked the Prophet about praying in a single garment. The Prophet said, Has every one of you two garments? A man put a similar question to `Umar on which he replied, When Allah makes you wealthier then you should clothe yourself properly during prayers. Otherwise one can pray with an Izar and a Rida' (a sheet covering the upper part of the body.) Izar and a shirt, Izar and a Qaba', trousers and a Rida, trousers and a shirt or trousers and a Qaba', Tubban and a Qaba' or Tubban and a shirt. (The narrator added, I think that he also said a Tubban and a Rida. )
Narrated Ibn `Umar: A person asked Allah's Apostle, What should a Muhrim wear? He replied, He should not wear shirts, trousers, a burnus (a hooded cloak), or clothes which are stained with saffron or Wars (a kind of perfume). Whoever does not find a sandal to wear can wear Khuffs (socks made from thick fabric or leather), but these should be cut short so as not to cover the ankles.