Al Mu’minun Ayah 103

وَمَنْ خَفَّتْ مَوَٲزِينُهُۥ فَأُوْلَـٰٓئِكَ ٱلَّذِينَ خَسِرُوٓاْ أَنفُسَهُمْ فِى جَهَنَّمَ خَـٰلِدُونَ ١٠٣ But those whose scale is light, they will have doomed themselves, staying in Hell forever.