Is the testimony of an heir who admits a debt valid when combined with the testimony of a non-heir stranger?

Primary text

If a non-heir stranger testifies alongside the heir who admitted the debt, the testimony is completed, and the claimant is ruled to have proven what they testified to, provided both are trustworthy ('adlan) and deliver the testimony using the specific phrasing of testimony, not the phrasing of admission. This is due to the principle that testimony should not be used to secure a personal benefit, which is not the case here for the admitting heir.