The Messenger of Allah ﷺ would not pray in our shiar.Bishr explained that the shiar is the garment worn underneath the outer covering.
حدثنا عفان قال حدثنا بشر يعني ابن مفضل قال حدثنا سلمة بن علقمة عن محمد بن سيرين قال نبئت أن
كان رسول الله ﷺ لا يصلي في شعرنا قال بشر هو الثوب الذي يلبس تحت الدثار
No references are available.
Its chain is sahih, but it is disconnected, as Ibn Sirin did not specify who informed him, on the authority of Ayesha. Muslim bin Alqama is trustworthy, and his hadith appears in the Sahihayn. The hadith was narrated by Abu Dawud (1/101, no. 367) in the chapter on purification, and by Tirmidhi (2/496, no. 600), who said, hasan sahih, and by Nasai (8/217, no. 5366), where it is connected, for they narrated it from Ibn Sirin, from Abdullah bin Shaqiq, from Ayesha. Her word "shiarina" is the plural of "shiar," which is the garment that touches the body.