Predetermined disbelief despite evidence

وَقَالُوا۟ مَهْمَا تَأْتِنَا بِهِۦ مِنْ ءَايَةٍ لِّتَسْحَرَنَا بِهَا فَمَا نَحْنُ لَكَ بِمُؤْمِنِينَ

And they said, "No matter what sign you bring us with which to bewitch us, we will not be believers in you."