(Al-An'aam) 6 : 109
وَأَقْسَمُوا بِاللَّهِ جَهْدَ أَيْمَانِهِمْ لَئِنْ جَاءَتْهُمْ آيَةٌ لَيُؤْمِنُنَّ بِهَا ۚ قُلْ إِنَّمَا الْآيَاتُ عِنْدَ اللَّهِ ۖ وَمَا يُشْعِرُكُمْ أَنَّهَا إِذَا جَاءَتْ لَا يُؤْمِنُونَ
And they are swearing by Lord Allah for their stiffest oath that if a Sign comes to them, surely they would believe with It; You say: "Indeed Signs are near Allah, how I can make you perceive that even if it comes indeed they would not believe".