Qur'ān 23:30 · Al-Mu'minun (المؤمنون)

إِنَّ فِى ذَٰلِكَ لَـَٔايَـٰتٍۢ وَإِن كُنَّا لَمُبْتَلِينَ

Indeed in that are signs, and indeed, We are ever testing [Our servants].