كتاب الإمارة
33
The Book on Government
(5)
Chapter: The virtue of a just ruler and the punishment of a tyrant; Encouragement to treat those under one's authority with kindness and the prohibition against causing them hardship
(5)
باب فَضِيلَةِ الإِمَامِ الْعَادِلِ وَعُقُوبَةِ الْجَائِرِ وَالْحَثِّ عَلَى الرِّفْقِ بِالرَّعِيَّةِ وَالنَّهْيِ عَنْ إِدْخَالِ الْمَشَقَّةِ عَلَيْهِمْ

It has been narrated on the authority of 'Abdullah b. 'Umar that the Messenger of Allah (ﷺ) said:

Behold! the Dispensers of justice will be seated on the pulpits of light beside God, on the right side of the Merciful, Exalted and GlorioUS. Either side of the Being is the right side both being equally mrneritorious. (The Dispensers of justice are) those who do justice in their rules, in matters relating to their families and in all that they undertake to do.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَزُهَيْرُ بْنُ حَرْبٍ، وَابْنُ، نُمَيْرٍ قَالُوا حَدَّثَنَا سُفْيَانُ، بْنُ عُيَيْنَةَ عَنْ عَمْرٍو، - يَعْنِي ابْنَ دِينَارٍ - عَنْ عَمْرِو بْنِ أَوْسٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، قَالَ ابْنُ نُمَيْرٍ وَأَبُو بَكْرٍ يَبْلُغُ بِهِ النَّبِيَّ صلى الله عليه وسلم وَفِي حَدِيثِ زُهَيْرٍ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ إِنَّ الْمُقْسِطِينَ عِنْدَ اللَّهِ عَلَى مَنَابِرَ مِنْ نُورٍ عَنْ يَمِينِ الرَّحْمَنِ عَزَّ وَجَلَّ وَكِلْتَا يَدَيْهِ يَمِينٌ الَّذِينَ يَعْدِلُونَ فِي حُكْمِهِمْ وَأَهْلِيهِمْ وَمَا وَلُوا ‏"‏ ‏.‏
Reference : Sahih Muslim 1827
In-book reference : Book 33, Hadith 21
USC-MSA web (English) reference : Book 20, Hadith 4493
  (deprecated numbering scheme)