"So you will see" on the Day of Resurrection, "and they will see," meaning: the polytheists. That is: they will see that you were the one rightly guided, and that they were the ones who were astray.
﴿فستبصر﴾ يَوْم الْقِيَامَة ﴿ويبصرون﴾ يَعْنِي: الْمُشْرِكِينَ، أَيْ: سَيُبْصِرُونَ أَنَّكَ كنت الْمُهْتَدي، وَأَنَّهُمْ الضُّلالُ
