And they said, مَهْمَا تَأْتِنَا بِهِ مِنْ آيَةٍ لِّتَسْحَرَنَا بِهَا فَمَا نَحْنُ لَكَ بِمُؤْمِنِينَ 'Whatever sign you bring to us in order to enchant us therewith, we are not going to believe in you."