It is narrated from Ibn al-Munkadir (may Allah have mercy on him): We came to Jabir bin Abdullah (may Allah be pleased with them both) while he was praying in a single garment. When he finished the prayer with the salam, we said: "O Abu Abdullah! Are you praying in just one garment while your upper sheet is lying right here?" He said: "Yes! I like that ignorant people like you should see me. The Messenger of Allah (peace and blessings be upon him) used to pray like this."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3279