Is a party obligated to provide a witness for their right if the right is established through the defendant's refusal to swear or the claimant's oath following such refusal?

Primary text

If a right is established before the judge through the defendant's refusal to swear (nikul) or the claimant's oath after the refusal, and the claimant then requests the established party to witness their own right, this is obligatory. This is because the claimant has no other means of proof except the attestation.