Quran 29:2 from Surah Al-Ankaboot on Divine Marvels.
أَحَسِبَ ٱلنَّاسُ أَن يُتۡرَكُوٓاْ أَن يَقُولُوٓاْ ءَامَنَّا وَهُمۡ لَا يُفۡتَنُونَ
English translation: Do think the people that they will be left because they say We believe and they will not (be tested) (will not) be tested
Transliteration: ahasiba al-nasu an yut'raku an yaqulu amanna wahum la yuf'tanuna