He saw the Messenger of Allah ﷺ praying in a single garment in the house of Umm Salama, with its two ends placed over his shoulders.
أخبرنا قتيبة عن مالك عن هشام بن عروة عن أبيه
أنه رأى رسول الله ﷺ يصلي في ثوب واحد في بيت أم سلمة واضعا طرفيه على عاتقيه
Bukhari transmitted it, h: 354, 356, and see the previous hadith. Also Muslim, h: 517, and see the previous hadith, from the hadith of Hisham, with this wording. It is also found in Muwatta (Yahya): 1/140, and Kubra, h: 840.