عَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُصَلِّي أَوْ يَسْتَحِبُّ أَنْ يُصَلِّيَ عَلَى فَرْوَةٍ مَدْبُوغَةٍ
Sayyiduna Mughira bin Shu’bah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) used to pray on tanned leather or liked to pray on it.