(48) باب جَوَازِ الْجَمَاعَةِ فِي النَّافِلَةِ وَالصَّلاَةِ عَلَى حَصِيرٍ وَخُمْرَةٍ وَثَوْبٍ وَغَيْرِهَا مِنَ الطَّاهِرَاتِ
Abu Sa'id al-Khudri reported that he went to the Messenger of Allah (ﷺ) and found him observing prayer on a mat and prostrating on that. (PT)
Reference (PT): Sahih Muslim 661 (PT)
In-book reference (PT): Book 5, Hadith 341 (PT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1393 (PT)