بُلُوغُ الْمَرَامِ
Bulugh al-Maram 209
The Book of Prayer
وَلَهُمَا مِنْ حَدِيثِ أَبِي هُرَيْرَةَ - رضى الله عنه - { لَا يُصَلِّي أَحَدُكُمْ فِي اَلثَّوْبِ اَلْوَاحِدِ لَيْسَ عَلَى عَاتِقِهِ مِنْهُ شَيْءٌ } [1]
Narrated Abu Hurairah (RA): [The Prophet (ﷺ) said:] None of you should offer Salat (prayer) in a single garment with no part of it on his shoulders. [Agreed upon].
Sunnah.com reference: Book 2, Hadith 72