It is narrated from Sayyiduna Umar bin Abi Salamah (may Allah be pleased with him): "The Prophet (peace and blessings be upon him) prayed in a single garment, the two ends of which he (peace and blessings be upon him) had crossed over each other."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8240