Sahih Muslim | Book 18 | Hadith Number 4247

Narrated by Umm Salama
Umm Salama reported Allah's Messenger (may peace be upon him) as saying: You bring to me, for (judgment) your disputes, some of you perhaps being more eloquent in their plea than others, so I give judgment on their behalf according to what I hear from them, (Bear in mind, in my judgment) if I slice off anything for him from the right of his brother, he should not accept that, for I sliced off for him a portion from the Hell.