(1) باب الْيَمِينُ عَلَى الْمُدَّعَى عَلَيْهِ
Ibn 'Abbas reported that Allah's Messenger (ﷺ) pronounced judgment on the basis of oath by the defendant.
Reference: Sahih Muslim 1711 b
In-book reference: Book 30, Hadith 2
USC-MSA web (English) reference(deprecated numbering scheme): Book 18, Hadith 4245