Does blood money become null and void if the victim forgives his killer before his death, or is it a right of the heirs that is not forfeited except with their consent?

It is permissible for a person to pardon the blood money for himself. If the offense was intentional, all the blood money is waived. If it was accidental, the pardon is considered from one-third of the pardoner's estate. If the blood money is equal to or less than one-third, the pardon is fully executed. If it exceeds one-third, the excess amount depends on the heirs' approval. In the case of intentional offense, qisas (retaliation) is waived, and the heirs have no right concerning it. As for accidental offense, its consequence is financial, and the heirs do have a right concerning it; hence, it is considered from one-third.