Amatul Rahmân Omer:
And (O Companions of the Prophet! recall the time) when Allâh promised you (victory over) one of the two (enemy) parties; (the well-equipped Makkan army and the other ill-equipped caravan from Syria), that it should be yours (for fighting against), while you wanted the unarmed party to fall into your hands (to get an easy victory), but Allâh wanted to establish the truth by fulfilling His words (of prophecy) and to cut off the very root of the disbelievers;