NASAI 5422: 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, and I may pass judgment on the basis of what I hear. If I pass judgment in favor of one of you against his brother's rights, then it is a piece of the fire that I am giving him.'"

النسائي ٥٤٢٢: عن ام سلمه —
قَالَ رَسُولُ اللَّهِ ﷺ إِنَّكُمْ تَخْتَصِمُونَ إِلَىَّ وَإِنَّمَا أَنَا بَشَرٌ وَلَعَلَّ بَعْضَكُمْ أَلْحَنُ بِحُجَّتِهِ مِنْ بَعْضٍ فَإِنَّمَا أَقْضِي بَيْنَكُمَا عَلَى نَحْوِ مَا أَسْمَعُ فَمَنْ قَضَيْتُ لَهُ مِنْ حَقِّ أَخِيهِ شَيْئًا فَإِنَّمَا أَقْطَعُ لَهُ قِطْعَةً مِنَ النَّارِ


Sound (ʿAli Zaʾī)
Nasāʾī > Etiquette of Judges > § What May Cancel a Judgment
hadithunlocked.com