Today's hadith · justice
As-Sunan al-Kubra of al-Bayhaqi (hasan)
The burden of proof
الْبَيِّنَةُ عَلَى الْمُدَّعِي، وَالْيَمِينُ عَلَى مَنْ أَنْكَرَ
Al-bayyinatu 'ala-l-mudda'i, wa-l-yaminu 'ala man ankar.
The burden of proof is on the claimant, and the oath is on the one who denies.
Narrated by Ibn Abbas.
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