قُل لَّن يُصِيبَنَا إِلَّا مَا كَتَبَ اللَّهُ لَنَا هُوَ مَوْلَانَا ۚ وَعَلَى اللَّهِ فَلْيَتَوَكَّلِ الْمُؤْمِنُونَ

For true men of faith, there is no question of failure in this world. Their success lies in God being pleased with them and this is a certainty, in both good times and bad. If any trouble befalls a believer, this increases his inclination towards God. If he receives some benefit, this creates the feeling of obligation and gratitude in him and, by being grateful to God, he becomes entitled to further blessings from Him. ‘So wait, if you will; we too, are waiting with you.’ On the face of it, this is a statement of believers, but in fact these are God’s words addressed to unbelievers. God is telling them in a warning tone that although they have been waiting for the destruction of the believers, the fact is that in God’s scheme they are destined to achieve eternal success, and what is going to happen to them (the opponents) is that after their being given a long rope to fully and finally establish their guilt, they will be consigned to eternal degradation and punishment.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (9:51)