(4) Prayer
كتاب الصلاة
(9a) Chapter: Suitable Dress - Section 1
(8) باب الستر - الفصل الأول
Mishkat al-Masabih 754 
“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.)
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
 مُتَّفق عَلَيْهِ  (الألباني)حكم :
Reference : Mishkat al-Masabih 754
In-book reference : Book 4, Hadith 182