وَلَوْ نَزَّلْنَا عَلَيْكَ كِتَـٰبًا فِى قِرْطَاسٍ فَلَمَسُوهُ بِأَيْدِيهِمْ لَقَالَ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَـٰذَآ إِلَّا سِحْرٌ مُّبِينٌ Qur’an Al-An'am (6:7)Walaw nazzalna AAalayka kitaban fee qirtasin falamasoohu biaydeehim laqala allatheena kafaroo in hatha illa sihrun mubeenun
The materialists want to see actual physical material things before them, but if such a thing came from an unusual source or expressed things they cannot understand, they give it some name like magic, or superstition, or whatever name is in fashion, and they are not helped at all in attaining faith, because their "hearts are diseased" (ii. 10)