Al An'am, 109 Ayah
6:109
وَأَقۡسَمُواْ بِٱللَّهِ جَهۡدَ أَيۡمَٰنِهِمۡ لَئِن جَآءَتۡهُمۡ ءَايَةٞ لَّيُؤۡمِنُنَّ بِهَاۚ قُلۡ إِنَّمَا ٱلۡأٓيَٰتُ عِندَ ٱللَّهِۖ وَمَا يُشۡعِرُكُمۡ أَنَّهَآ إِذَا جَآءَتۡ لَا يُؤۡمِنُونَ ١٠٩
Wa 'Aqsamū Bil-Lahi Jahda 'Aymānihim La'in Jā'at/hum 'Āyatun Layu'uminunna Bihā ۚ Qul 'Innamā Al-'Āyātu `Inda Al-Lahi ۖ Wa Mā Yush`irukum 'Annahā 'Idhā Jā'at Lā Yu'uminūna
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.