الانعام — Al-An'am Ayat 109
وَاَقْسَمُوْا بِاللّٰهِ جَهْدَ اَيْمَانِهِمْ لَىِٕنْ جَاۤءَتْهُمْ اٰيَةٌ لَّيُؤْمِنُنَّ بِهَاۗ قُلْ اِنَّمَا الْاٰيٰتُ عِنْدَ اللّٰهِ وَمَا يُشْعِرُكُمْ اَنَّهَآ اِذَا جَاۤءَتْ لَا يُؤْمِنُوْنَ
Wa aqsamū billāhi jahda aimānihim la'in jā'athum āyatul layu'minunna bihā, qul innamal-āyātu ‘indallāhi wa mā yusy‘irukum annahā iżā jā'at lā yu'minūn(a).
"And they swear by Allah their strongest oaths that if a sign came to them, they would surely believe in it. Say, "The signs are only with Allah." And what will make you perceive that even if a sign came, they would not believe."