فَإِذا جاءَ وَعدُ أولاهُما بَعَثنا عَلَيكُم عِبادًا لَنا أُولي بَأسٍ شَديدٍ فَجاسوا خِلالَ الدِّيارِ ۚ وَكانَ وَعدًا مَفعولًا

So when the [time of] promise came for the first of them, We sent against you servants of Ours - those of great military might, and they probed [even] into the homes, and it was a promise fulfilled.