Surat Al-'An`ām - سورة الأنعام

وَإِن كَانَ كَبُرَ عَلَيْكَ إِعْرَاضُهُمْ فَإِنِ اسْتَطَعْتَ أَن تَبْتَغِيَ نَفَقًا فِي الْأَرْضِ أَوْ سُلَّمًا فِي السَّمَاءِ فَتَأْتِيَهُم بِآيَةٍ ۚ وَلَوْ شَاءَ اللَّهُ لَجَمَعَهُمْ عَلَى الْهُدَىٰ ۚ فَلَا تَكُونَنَّ مِنَ الْجَاهِلِينَ

Muhsin Khan: If their aversion (from you, O Muhammad SAW and from that with which you have been sent) is hard on you, (and you cannot be patient from their harm to you), then if you were able to seek a tunnel in the ground or a ladder to the sky, so that you may bring them a sign (and you cannot do it, so be patient). And had Allah willed, He could have gathered them together (all) unto true guidance, so be not you one of those who are Al-Jahilun (the ignorant).