Surah Al-'Ankabut, Verse 3

وَلَقَدۡ فَتَنَّا ٱلَّذِينَ مِن قَبۡلِهِمۡۖ فَلَيَعۡلَمَنَّ ٱللَّهُ ٱلَّذِينَ صَدَقُواْ وَلَيَعۡلَمَنَّ ٱلۡكَٰذِبِينَ٣

walaqad fatannā alladhīna min qablihim falayaʿlamanna l-lahu alladhīna ṣadaqū walayaʿlamanna l-kādhibīna

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.