(2) باب الدعوى والبينات
Narrated Ibn 'Abbas (RA):
The Prophet (ﷺ) said: "If people were given whatever they claimed (in disputes), some people would claim the lives and wealth of others; but the oath (of denial) must be taken by the defendant."[Agreed upon]. al-Baihaqi has reported with a Sahih (authentic) chain of narrators: "But the proof (Bayyinah) lies on the one who is making the claim, and the other (Yamin) must be taken by the one who rejects the claim."
Reference: Bulugh al-Maram 1423
In-book reference: Book 14, Hadith 27
English translation: Book 14, Hadith 1423