(16) باب إِثْمِ مَنْ خَاصَمَ فِي بَاطِلٍ وَهْوَ يَعْلَمُهُ
Narrated Um Salama:
(the wife of the Prophet) Allah's Messenger (ﷺ) heard some people quarreling at the door of his dwelling. He came out and said, "I am only a human being, and opponents come to me (to settle their problems); maybe someone amongst you can present his case more eloquently than the other, whereby I may consider him true and give a verdict in his favor. So, If I give the right of a Muslim to another by mistake, then it is really a portion of (Hell) Fire, he has the option to take or give up (before the Day of Resurrection).
Reference: Sahih al-Bukhari 2458
In-book reference: Book 46, Hadith 19
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 43, Hadith 638