One who performs Prayer with something between himself and the Prayer direction
حَدَّثَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا زَيْدُ بْنُ الْحُبَابِ، حَدَّثَنِي أَبُو الْمِقْدَامِ، عَنْ مُحَمَّدِ بْنِ كَعْبٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ نَهَى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ أَنْ يُصَلَّى خَلْفَ الْمُتَحَدِّثِ وَالنَّائِمِ .
It was narrated that Ibn ‘Abbas said: “The Messenger of Allah (ﷺ) forbade performing prayer behind one who is engaged in conversation or one who is sleeping.”