The most beloved garment to the Messenger of Allah ﷺ was the shirt.
كان أحب الثياب إلى رسول الله ﷺ القميص.
No references are available.
Reported by Abu Dawud (4025), Tirmidhi (1764), Nasai in Al-Kubra (9668), and Bayhaqi (2/239), all of them from the hadith of Abdul-Mumin bin Khalid Hanafi, from Abdullah bin Burayda, from Umm Salama, who said, and she mentioned it.Its chain is hasan on account of Abdul-Mumin bin Khalid, for his hadith is hasan, and a detailed discussion has already passed in the biography of the Prophet.