What is the ruling of Islamic law regarding a debt owed by a deceased woman to her daughter, and regarding her will to allocate one-third of her wealth to her daughter's children as a vow? And do the children of her son, who died before her, have a share in her inheritance?

First, debts must be paid off. Then, the bequest to the daughter's children should be disbursed from one-third of the estate only, as they are not heirs. The remainder is then to be divided among the heirs: two-thirds for the two daughters, and the rest to the son's children by way of ta'sib, with the male receiving the share of two females. This matter should be referred to the Sharia courts due to the complex issues involved.