Sahih al-Bukhari
Sahih al-Bukhari 359
If someone offers Salat (prayer) wrapped in a single garment, he should cross its corners round his shoulders
Arabic hadith text
حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنْ عَبْدِ الرَّحْمَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم "لاَ يُصَلِّي أَحَدُكُمْ فِي الثَّوْبِ الْوَاحِدِ، لَيْسَ عَلَى عَاتِقَيْهِ شَىْءٌ "
Translation
Narrated Abu Huraira
The Prophet (ﷺ) said, "None of you should offer prayer in a single garment that does not cover the shoulders."