Talhah bin Yahya (may Allah have mercy on him) narrates, through Ubaydullah bin Abdullah (may Allah have mercy on him), from Sayyiduna Mu'awiyah bin Abi Sufyan (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to pray in a single garment.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16810