Must the heirs or children do anything concerning the father's oath to build a house for his young children, which he was unable to fulfill before his death?

A father breaks his oath if he swears to build a house without specifying a timeframe for its completion, and sufficient time for construction becomes available, but he then dies before completing it. This is because the act became impossible after it was possible. However, he does not break his oath if he specified a timeframe for completion and died before it, or if he conditioned it on ability and the act became intellectually impossible. The children are not obligated to build the house from the father's wealth after his death, but expiation for the oath must be paid from his estate before the distribution of the inheritance.