Giving the deceased father's share of the inheritance to his children during the grandfather's lifetime

Q 1: A man has two sons, six daughters and three wives. His elder son died leaving behind sons and daughters. He wants to give his son's share of inheritance to his orphaned grandsons; is it permissible? If it is not permissible to give the grandsons their father's share of inheritance, is it permissible for the grandfather (Part No. 16; Page No. 320) to bequeath his grandsons a portion of his money in the same amount of the value of their father's share of inheritance before he died, as if their father outlived their grandfather?

A: It is permissible for the grandfather to bequeath their father's share of inheritance to his grandsons even if their father is alive. He may bequeath it to them during his life. It is permissible for him to bequeath his grandsons some money if they do not inherit. The amount should be around one third of his estate if he does not bequeath anything else of his money to anyone else. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.