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

Surah Al-Anaam : 35
And if their evasion is difficult for you, then if you are able to seek a tunnel into the earth or a stairway into the sky to bring them a sign, [then do so]. But if Allah had willed, He would have united them upon guidance. So never be of the ignorant.

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