وَلَوْ جَاءتْهُمْ كُلُّ آيَةٍ حَتَّى يَرَوُاْ الْعَذَابَ الأَلِيمَ
[10:97]
Though every sign should come to them, until they witness the painful chastisement.
Even if every Sign was brought unto them,- until they see (for themselves) the penalty grievous.
Though every token come unto them, till they see the painful doom.