Uthman bin al-Aswad narrates from Ibn Abi Mulaykah (may Allah have mercy on him) that he said: I was the judge of Taif on behalf of Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both). He mentioned the story of the two women, and said: I wrote to Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both), and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) wrote in reply that the Messenger of Allah (peace and blessings be upon him) said: "If people were given on the basis of their claims, people would claim the wealth and blood of their people; but 'the proof is upon the claimant, and the oath is upon the one who denies.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21201