عَنْ أَبِي الدَّرْدَاءِ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ((إِنَّ أَفْضَلَ شَيْءٍ فِي الْمِيزَانِ قَالَ ابْنُ أَبِي بُكَيْرٍ أَثْقَلَ شَيْءٍ فِي الْمِيزَانِ يَوْمَ الْقِيَامَةِ الْخُلُقُ الْحَسَنُ))
Sayyiduna Abu Darda (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: On the Day of Judgment, the most virtuous thing in the scale—and according to another narration, the heaviest thing—will be good character.