Abu Idrees al-Khulani أبو إدريس الخولاني · Chapters on Dress

It was narrated from Anas bin Malik that the Messenger of Allah (ﷺ) granted a concession to Zubair bin ‘Awwam and ‘Abdur-Rahman bin ‘Auf, allowing them to wear silk shirts, because of a rash they were suffering from.

“The Messenger of Allah (ﷺ) forbade putting on sandals whilst standing.”