Two sets of proof when equal

It is narrated from Urwah (may Allah have mercy on him) that a dispute arose among people of the tribe of Fahm and the tribe of Banu Sulaym concerning a mine. They took their dispute to Marwan, and Marwan ordered Sayyiduna Ibn al-Zubayr (may Allah be pleased with him) to judge between them. When he came to judge, the testimonies established on both sides were equal. Sayyiduna Ibn al-Zubayr (may Allah be pleased with him) cast lots between them and, because testimony had been established on both sides, ruled in favor of the one whose name came up in the lot.

Ibrahim (may Allah have mercy on him) said that if the testimonies established on both sides are equal, the thing is deemed the right of whoever has possession of it.

Al-Zuhri (may Allah have mercy on him) said that if the witnesses among a group of people differ, and those witnesses are equal in probity and in number, then the oath falls upon the defendant.