وَيَقُولُونَ سُبْحَٰنَ رَبِّنَآ إِن كَانَ وَعْدُ رَبِّنَا لَمَفْعُولًا
18:99; 19:62; 46:17; 73:19.
Commentary:
The words سبحان ربنا (Holy is our Lord) show that it was inevitable that the cause of Islam should prosper and its opponents should be completely discomfited and overthrown. For if it had not been so, it would have constituted a reflection on the glory and Holiness of God Who had promised success and victory to Muslims and defeat and discomfiture to disbelievers.
18:99; 19:62; 46:17; 73:19.