Surah Ali'Imran, Verse 141

وَلِيُمَحِّصَ ٱللَّهُ ٱلَّذِينَ ءَامَنُواْ وَيَمۡحَقَ ٱلۡكَٰفِرِينَ١٤١

waliyumaḥḥiṣa l-lahu alladhīna āmanū wayamḥaqa l-kāfirīna

And that Allāh may purify the believers [through trials] and destroy the disbelievers.