Qur'an 29:3 · Al-Ankaboot

وَلَقَدْ فَتَنَّا ٱلَّذِينَ مِن قَبْلِهِمْ ۖ فَلَيَعْلَمَنَّ ٱللَّهُ ٱلَّذِينَ صَدَقُوا۟ وَلَيَعْلَمَنَّ ٱلْكَٰذِبِينَ

(3) But We have certainly tried those before them, and Allāh will surely make evident those who are truthful, and He will surely make evident the liars.