Do the daughters' children who passed away before their mother inherit from their mother's estate, and what is the reality of the obligatory bequest (Al-Wasiyya Al-Wajiba) in Egyptian law, and what is the opinion of the four madhhabs on this issue?

The daughters' children do not have a prescribed share in their grandmother's inheritance, unless she bequeaths something to them within the limit of one-third. The law of obligatory bequest (al-wasiyya al-wajiba) enforced in some countries is not Islamically sound, and it is incorrect to attribute it to the four madhhabs or early scholars.