What is the ruling on selling the heirs' share of an inheritance to pay off the deceased's debt, and is this considered an injustice?

If you paid off the debt as a donation, you have no recourse against the remaining heirs. However, if you paid it with the intention of recourse against the heirs, then you have the right to demand from them what was paid on their behalf from the deceased's debt. Thus, "if the executor or the heirs pay the cost of the deceased's shroud from their own money, they have recourse to the estate and are not considered volunteers. The same applies if the executor or an heir pays the deceased's debt from their own money."