Has the threefold divorce oath fallen upon the father who swore not to bring something, then the mother bought that thing after informing him of it, knowing that the money used was part of the daughter's money which she gave to her mother, and then the mother gave it to the father?

Your father's situation regarding the oath is one of three:

1. He intended not to buy it himself. In this case, he does not break his oath if you buy it for him. 2. He intended that this item should not be bought at all. In this case, he breaks his oath if you buy it for him. 3. He had no specific intention. In this case, one refers back to the reason for the oath and what prompted it. If the reason is no longer present, he does not break his oath.

In summary: The matter of an oath refers back to the intention and purpose of the one who swore it. If he had no specific intention, then it refers back to the reason for the oath.