وَاَمْطَرْنَا عَلَيْهِمْ مَّطَرًاۚ فَسَاۤءَ مَطَرُ الْمُنْذَرِيْنَ ࣖ ( النمل: ٥٨ )
Wa amtarnaa 'alaihimm mataran fasaaa'a matarul munzareen (an-Naml 27:58)
And We rained upon them a rain [of stones], and evil was the rain of those who were warned. (An-Naml  : 58)
1 Mufti Taqi Usmani
And We rained on them a rain. So evil was the rain of those who were warned.