Quran 36:28

وَمَآ أَنزَلۡنَا عَلَىٰ قَوۡمِهِۦ مِنۢ بَعۡدِهِۦ مِن جُندٍ۬ مِّنَ ٱلسَّمَآءِ وَمَا كُنَّا مُنزِلِينَ ٢٨

We did not send down upon his people, after him, soldiers from the sky; we did not need to send them down.