Surah Al-Ankaboot, Verse 3
وَلَقَدْ فَتَنَّا ٱلَّذِينَ مِن قَبْلِهِمْ ۖ فَلَيَعْلَمَنَّ ٱللَّهُ ٱلَّذِينَ صَدَقُوا۟ وَلَيَعْلَمَنَّ ٱلْكَٰذِبِينَ
Translation — Sahih International
But We have certainly tried those before them, and Allah will surely make evident those who are truthful, and He will surely make evident the liars.
Source
Kur'an-ı Kerim, Ankebût Suresi 29:3
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/29-suresi-3-ayet