Narrated Umm Salamah (RA):
Allah's Messenger (ﷺ) said: "Indeed, you bring your disputers to me, and perhaps some of you are more eloquent in their plea than others, so that I give judgement on their behalf according to what I hear from them. Therefore, whatever I rule for anyone which by right belongs to his brother, I am only granting him a portion of Hell-fire."[Agreed upon]. (ES)
Reference (ES): Bulugh al-Maram 1404 (ES)
In-book reference (ES): Book 14, Hadith 8 (ES)
English translation (ES): Book 14, Hadith 1404 (ES)