Surah At-Taubah (The Repentance), Verse 110

لَا یَزَالُ بُنْیَانُهُمُ الَّذِیْ بَنَوْا رِیْبَةً فِیْ قُلُوْبِهِمْ اِلَّاۤ اَنْ تَقَطَّعَ قُلُوْبُهُمْ وَاللّٰهُ عَلِیْمٌ حَكِیْمٌ 

Laa yazaalu bunyaanu humul lazee banaw reebatan fee quloobihim illaaa an taqatta'a quloobuhum; wal laahu 'Aleemun Hakeem

“The foundation of those who so build is never free from suspicion and shakiness in their hearts, until their hearts are cut to pieces. And Allah is All-Knowing, Wise.”

Quran 9:110 (Yusuf Ali Translation)