The Prophet ﷺ said, "None of you should offer prayer in a single garment that does not cover the shoulders."  

قَالَ النَّبِيُّ ﷺ لاَ يُصَلِّي أَحَدُكُمْ فِي الثَّوْبِ الْوَاحِدِ لَيْسَ عَلَى عَاتِقَيْهِ شَىْءٌ  

Messenger of Allah ﷺ said, "Whoever prays in a single garment must cross its ends (over the shoulders).  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنْ صَلَّى فِي ثَوْبٍ وَاحِدٍ فَلْيُخَالِفْ بَيْنَ طَرَفَيْهِ