Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) states: The Prophet (peace and blessings be upon him) prayed in a single garment which he had wrapped around himself (tawshih), and with its extra portion he was protecting himself from the heat or the cold of the ground.
Imam Ahmad recorded this narration. In a narration of his the wording is: "He had no garment on his body other than it." He recorded this narration with several chains, some of which will be mentioned later; all these narrations establish that the prayer was offered in a single garment. Imam Ahmad, Imam Abu Ya'la and Imam al-Tabarani in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat recorded this narration; the narrators of Imam Ahmad are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2198