And Moses chose seventy of his people for Our place of meeting : when they were seized with violent quaking , he prayed : " O my Lord ! if it had been Thy will Thou couldst have destroyed , long before , both them and me : wouldst Thou destroy us for the deeds of the foolish ones among us ? this is no more than Thy trial : by it Thou causest whom Thou wilt to stray , and Thou leadest whom Thou wilt into the right path . Thou art our Protector : so forgive us and give us Thy mercy ; for Thou art the best of those who forgive .