Surah Aali Imran (The Family of Imran), Verse 82

فَمَنْ تَوَلّٰی بَعْدَ ذٰلِكَ فَاُولٰٓىِٕكَ هُمُ الْفٰسِقُوْنَ ۟

Faman tawallaa ba'da zaalika fa ulaaa'ika humul faasiqoon

“If any turn back after this, they are perverted transgressors.”

Quran 3:82 (Yusuf Ali Translation)