Chapter on the Invalidation of the Claimant's Right by Administering an Oath Even if They Have Evidence

Abdullah bin Abi Ya'fur narrated from Abu Abdullah عليه السلام, who said: "If the claimant is satisfied with the oath of the defendant regarding his claim, and he requests the defendant to swear, and the defendant swears that there is no right due to the claimant upon him, then the oath nullifies the claimant's right, and he no longer has a claim." I said: "What if the claimant has a just and valid proof?" Imam عليه السلام said: "Yes, even if he later presents fifty witnesses after having requested the defendant to swear by Allah سبحانه وتعالى, he would have no right, for the oath has invalidated all previous claims for which he had requested the defendant to swear."