Sahih Bukhari Volume 001, Book 008, Hadith Number 366.
Narated By Muhammad bin Al-Munkadir : I went to Jabir bin 'Abdullah and he was praying wrapped in a garment and his Rida was Lying beside him. When he finished the prayers, I said "O 'Abdullah! You pray (in a single garment) while your Rida' is lying beside you." He replied, "Yes, I did it intentionally so that the ignorant ones like you might see me. I saw the Prophet praying like this."