It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that praying in a single garment is established from the Sunnah. In the blessed era of the Noble Prophet (peace and blessings be upon him), we used to do so, but no one reproached us for it. Upon hearing this, Hazrat Abdullah bin Mas'ud (may Allah be pleased with him) said: This ruling was for a time when people had a shortage of clothes. Now that Allah has granted abundance, it is better to pray in two garments.