What is the ruling on a dying person's bequest to exempt his daughter's husband from repaying the remainder of a loan after his death, knowing that there are no witnesses to this bequest, but his daughter is known for her honesty?

The testimony of a daughter that her father informed her of absolving her husband of a debt should he die before repayment is not accepted due to the accusation of drawing benefit. The testimony of a wife for her husband is rejected according to the majority of scholars. If the heirs do not confirm it or if no lawful evidence is presented, the debt is considered a right of the heirs. If the claim is proven and the absolution was conditioned on death, it takes the ruling of a will and is valid only within the limit of one-third (of the estate); anything exceeding that depends on the consent of the heirs.