Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad:27555 – Sufyān Marrah Ukhrá > ʿAmr > Ibn Abū Mulaykah > Yaʿlá b. Mamlak > Um al-Dardāʾ > Abū al-Dardāʾ

[Machine] On the authority of the Prophet ﷺ , he said, "The heaviest thing in the scale on the Day of Judgment is good character."  

أحمد:٢٧٥٥٥ – حَدَّثَنَا سُفْيَانُ مَرَّةً أُخْرَى عَنْ عَمْرٍو عَنِ ابْنِ أَبِي مُلَيْكَةَ عَنْ يَعْلَى بْنِ مَمْلَكٍ عَنْ أُمِّ الدَّرْدَاءِ عَنْ أَبِي الدَّرْدَاءِ

عَنِ النَّبِيِّ ﷺ قَالَ أَثْقَلُ شَيْءٍ فِي الْمِيزَانِ يَوْمَ الْقِيَامَةِ خُلُقٌ حَسَنٌ  

See similar narrations below:

Collected by Aḥmad, Ibn Ḥibbān, Suyūṭī
ahmad:27532 – Yaḥyá b. Saʿīd > Shuʿbah > al-Qāsim b. Abū Bazzah > ʿAṭāʾ al-Kaykhārānī > Um al-Dardāʾ > Abū al-Dardāʾ

[Machine] From the Prophet ﷺ: He said, "There is nothing heavier in the scale than good character."  

أحمد:٢٧٥٣٢ – حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ عَنْ شُعْبَةَ قَالَ حَدَّثَنِي الْقَاسِمُ بْنُ أَبِي بَزَّةَ عَنْ عَطَاءٍ الْكَيْخَارَانِيِّ عَنْ أُمِّ الدَّرْدَاءِ عَنْ أَبِي الدَّرْدَاءِ

عَنِ النَّبِيِّ ﷺ قَالَ لَيْسَ شَيْءٌ أَثْقَلَ فِي الْمِيزَانِ مِنْ خُلُقٍ حَسَنٍ  

ذِكْرُ الْبَيَانِ بِأَنَّ الْخُلُقَ الْحَسَنَ مِنْ أَثْقَلِ مَا يَجِدُ الْمَرْءُ فِي مِيزَانِهِ يَوْمَ الْقِيَامَةِ

ibnhibban:481 – Abū Khalīfah > Muḥammad b. Kathīr And Shuʿayb b. Muḥriz Wa-al-Ḥawḍī > Shuʿbah > al-Qāsim b. Abū Bazzah > ʿAṭāʾ al-Kaykhārānī > Um al-Dardāʾ > Abū al-Dardāʾ

[Machine] The Prophet ﷺ said, "The heaviest thing in the scale is good character."  

ابن حبّان:٤٨١ – أَخْبَرَنَا أَبُو خَلِيفَةَ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ وَشُعَيْبُ بْنُ مُحْرِزٍ وَالْحَوْضِيُّ قَالُوا حَدَّثَنَا شُعْبَةُ عَنِ الْقَاسِمِ بْنِ أَبِي بَزَّةَ عَنْ عَطَاءٍ الْكَيْخَارَانِيِّ عَنْ أُمِّ الدَّرْدَاءِ عَنْ أَبِي الدَّرْدَاءِ

عَنِ النَّبِيِّ ﷺ قَالَ «أَثْقَلُ شَيْءٍ فِي الْمِيزَانِ الْخُلُقُ الْحَسَنُ»