There is nothing heavier on the believer's scale on the Day of Judgment than good morals. Indeed, Allah detests the one who is indecent and foulmouthed
Authenticعَنْ أَبِي الدَّرْدَاءِ رضي الله عنه أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَا شَيْءٌ أَثْقَلُ فِي مِيزَانِ الْمُؤْمِنِ يَوْمَ القِيَامَةِ مِنْ خُلُقٍ حَسَنٍ، وَإِنَّ اللَّهَ لَيُبْغِضُ الفَاحِشَ البَذِيءَ».
Abu ad-Dardā’ (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "There is nothing heavier on the believer's scale on the Day of Judgment than good morals. Indeed, Allah detests the one who is indecent and foulmouthed."
Explanation
The Prophet (may Allah's peace and blessings be upon him) informed that the heaviest thing, among deeds and sayings, on the believer's scale on the Day of Judgment is good morals represented in having a cheerful face, refraining from harming others and doing good to others. Allah Almighty hates the one who is ugly in his deeds and words, the foulmouthed who uses offensive language.
Benefits
- The merit of good morals; for it leads one to win the love of Allah and the love of His slaves and it is the greatest thing weighed on the Day of Judgement.
Source · Narrated by Abu Dāwūd and At-Tirmidhi
From the Hadith Encyclopedia (hadeethenc.com).