3وَلَقَد فَتَنَّا الَّذينَ مِن قَبلِهِم ۖ فَلَيَعلَمَنَّ اللَّهُ الَّذينَ صَدَقوا وَلَيَعلَمَنَّ الكاذِبينَJ. M. RodwellWe put to proof those who lived before them; for God will surely take knowledge of those who are sincere, and will surely take knowledge of the liars.