If a person dies owing zakah, do his children clear the deceased's liability if they pay it?

Question:
If a person owes zakah and does not pay it, and then he dies, do his children clear the deceased's liability if they pay this zakah?

Answer:
If he has an estate, the zakah is paid from his estate because it is a debt upon him. Debts are settled before inheritance and before bequests. They are settled first. So it is the first right attached to the estate after preparing the body of the deceased. Thus, the debt is very important. However, if he has no estate and they wish to donate to clear the liability of their deceased, that is an act of kindness toward him and excellence in his treatment, even if he is not a relative of theirs.