63:3
Al-Munafiqun 3
Surah Al-Munafiqun (المنافقون), verse 3 — reference 63:3. Arabic text with optional translation and free audio on Al-Qalam.
ذَٰلِكَ بِأَنَّهُمْ ءَامَنُوا۟ ثُمَّ كَفَرُوا۟ فَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ
dhālika bi-annahum āmanū thumma kafarū faṭubiʿa ʿalā qulūbihim fahum lā yafqahūna
That is because they believed, and then they disbelieved; so their hearts were sealed over, and they do not understand.