Bulugh al-Maram 1408
Narrated 'Aishah (RA):
I heard Allah's Messenger (ﷺ) saying, "the just Qadi (judge) will be called (forth) on the Day of Resurrection and he will wish he had never given judgement even between two men throughout his life, due to the severity of the account he will face."

[Reported by Ibn Hibban. al-Baihaqi reported it with the wording: "...concerning a single tamrah (date fruit).
وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا قَالَتْ: سَمِعْتُ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-يَقُولُ: { 
" يُدْعَى بِالْقَاضِي اَلْعَادِلِ يَوْمَ اَلْقِيَامَةِ, فَيَلْقَى مِنْ شِدَّةِ اَلْحِسَابِ مَا يَتَمَنَّى أَنَّهُ لَمْ يَقْضِ بَيْنَ اِثْنَيْنِ فِي عُمْرِهِ" }  رَوَاهُ اِبْنُ حِبَّانَ  1‏ وَأَخْرَجَهُ اَلْبَيْهَقِيُّ, وَلَفْظُهُ:  { فِي تَمْرَةٍ }   2‏ .‏‏1 ‏- ضعيف.‏ رواه ابن حبان ( 1563 )‏.‏‏2 ‏- وهو كذلك عند أحمد في "المسند" ( 6 / 75 )‏.‏