Mishkat al-Masabih 4 Prayer كتاب الصلاة 182

عَن عمر بن أبي سَلمَة قَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي فِي ثَوْبٍ وَاحِدٍ مُشْتَمِلًا بِهِ فِي بَيْتِ أُمِّ سَلَمَةَ وَاضِعًا طَرَفَيْهِ عَلَى عَاتِقيهِ

“Umar b. Abu Salama said that he saw God’s Messenger praying in Umm Salama’s house girded with a single garment, placing its two ends over his shoulders.* * This is explained as meaning that the ends were each over a shoulder and under the other armpit and tied over the chest. (Bukhari and Muslim.)