Джами ат-Тирмизи #1987

مَا مِنْ شَيْءٍ أَثْقَلُ فِي مِيزَانِ الْمُؤْمِنِ يَوْمَ الْقِيَامَةِ مِنْ حُسْنِ الْخُلُقِ

The Messenger of Allah (ﷺ) said: 'Nothing will be heavier on the Day of Judgment in the scale of a believer than good character. Allah hates one who is obscene and shameless.'