عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ نَهَانِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنْ ثَلَاثَةٍ نَهَانِي عَنِ الْقَسِّيِّ وَالْمِيثَرَةِ وَأَنْ أَقْرَأَ وَأَنَا رَاكِعٌ
It is narrated from Sayyiduna Ali (may Allah be pleased with him), he says: The Noble Prophet (peace and blessings be upon him and his family) forbade me from three things: from wearing silk clothing, from silk cushions, and from reciting the Noble Qur’an during bowing (ruku’).