Legal maxim
البينة على المدعي واليمين على المدعى عليه
Al-Bayyinah 'ala al-Mudda'i: The Burden of Proof Is on the Claimant
14 hadith in the six books
الْبَيِّنَةُ عَلَى الْمُدَّعِي , وَالْيَمِينُ عَلَى الْمُدَّعَى عَلَيْهِ
Al-bayyinatu 'ala al-mudda'i, wal-yaminu 'ala al-mudda'a 'alayh.
The proof is due from the claimant, and the oath is due from the one the claim is made against.
“The proof is on the claimant, and the oath is on the one against whom the claim is made” is one of the best-known legal maxims drawn from hadith. Tirmidhi records it in exactly these words from a sermon of the Prophet; Bukhari and Muslim record, from Ibn Abbas, that the Prophet ruled that the oath is on the defendant.
The form often quoted, “wal-yaminu 'ala man ankar” (the oath is on the one who denies), is not found in this wording in the six books indexed here; the six books use “al-mudda'a 'alayh” (the defendant).
The maxim in the Prophet's words
If people were given what they claim
Ibn Abbas narrates that if people were given according to their claims, some would claim the blood and wealth of others, but the oath is on the defendant.
The ruling that the oath is on the defendant
“Your two witnesses or his oath”
Judgment with one witness and an oath
More in legal maxims in hadith