It is narrated from Sayyiduna Umar bin Abi Salamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) prayed in a single garment. He (peace and blessings be upon him) had wrapped this garment in such a way that its right end was over the left shoulder and its left end over the right shoulder.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3282