Language:
كتاب الصلح
53  
Peacemaking
(11)
Chapter: The superoirity of making peace and establishing justice among the people
(11)
باب فَضْلِ الإِصْلاَحِ بَيْنَ النَّاسِ وَالْعَدْلِ بَيْنَهُمْ
Sahih al-Bukhari 2707

Narrated Abu Huraira:

Allah's Messenger (ﷺ) said, "There is a Sadaqa to be given for every joint of the human body; and for every day on which the sun rises there is a reward of a Sadaqa (i.e. charitable gift) for the one who establishes justice among people."

حَدَّثَنَا إِسْحَاقُ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ هَمَّامٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ كُلُّ سُلاَمَى مِنَ النَّاسِ عَلَيْهِ صَدَقَةٌ، كُلَّ يَوْمٍ تَطْلُعُ فِيهِ الشَّمْسُ يَعْدِلُ بَيْنَ النَّاسِ صَدَقَةٌ ‏"‏‏.‏
Reference : Sahih al-Bukhari 2707
In-book reference : Book 53, Hadith 17
USC-MSA web (English) reference : Vol. 3, Book 49, Hadith 870
  (deprecated numbering scheme)