"Is this sorcery?" It is said to them in the form of a question. "Or do you not see?" meaning: in the worldly life, when you used to say: "This is sorcery," meaning: it is not sorcery.
﴿أفسحر هَذَا﴾ يُقَال لَهُم ذَلِك على الِاسْتِفْهَام ﴿أم أَنْتُم لَا تبصرون﴾ يَعْنِي: فِي الدُّنْيَا إِذْ كُنْتُم تَقولُونَ: هَذَا سحْرٌ، أَي: لَيْسَ بِسحر