وَإِن كَانَ كَبُرَ عَلَيْكَ إِعْرَاضُهُمْ فَإِنِ اسْتَطَعْتَ أَن تَبْتَغِيَ نَفَقًا فِي الأَرْضِ أَوْ سُلَّمًا فِي السَّمَاء فَتَأْتِيَهُم بِآيَةٍ وَلَوْ شَاء اللّهُ لَجَمَعَهُمْ عَلَى الْهُدَى فَلاَ تَكُونَنَّ مِنَ الْجَاهِلِينَ
[6:35]
And if their turning away is hard on you, then if you can seek an opening (to go down) into the earth or a ladder (to ascend up) to heaven so that you should bring them a sign and if Allah had pleased He would certainly have gathered them all on guidance, therefore be not of the ignorant.
If their spurning is hard on thy mind, yet if thou wert able to seek a tunnel in the ground or a ladder to the skies and bring them a sign,- (what good?). If it were Allah's will, He could gather them together unto true guidance: so be not thou amongst those who are swayed by ignorance (and impatience)!
And if their aversion is grievous unto thee, then, if thou canst, seek a way down into the earth or a ladder unto the sky that thou mayst bring unto them a portent (to convince them all)! - If Allah willed, He could have brought them all together to the guidance - So be not thou among the foolish ones.