NASAI 5401: from Um Salamah —
The Messenger of Allah [SAW] said: "You refer your disputes to me, but I am only human, and some of you may be more eloquent in arguing their case than others. If I pass judgment in favor of one of you, against his brother's rights, let him not take it, for it is a piece of fire that I am giving him."

النسائي ٥٤٠١: عن ام سلمه —
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّكُمْ تَخْتَصِمُونَ إِلَىَّ وَإِنَّمَا أَنَا بَشَرٌ وَلَعَلَّ بَعْضَكُمْ أَلْحَنُ بِحُجَّتِهِ مِنْ بَعْضٍ فَمَنْ قَضَيْتُ لَهُ مِنْ حَقِّ أَخِيهِ شَيْئًا فَلاَ يَأْخُذْهُ فَإِنَّمَا أَقْطَعُهُ بِهِ قِطْعَةً مِنَ النَّارِ


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Nasāʾī > Etiquette of Judges > § Judgment Based on What is Apparent
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