Does the mother's share of her deceased daughter's inheritance return to the daughter's children (the mother's orphans) after the mother's death?

If a mother inherits from her daughter and then dies, the mother's share does not revert to the deceased daughter's children. Rather, it is inherited by the mother's legal heirs, whether they are those entitled to a prescribed share (Ashab al-Furood) or residuaries (Asabat), because the daughter's children are considered "dhawu al-arham" (relatives by kinship) who only inherit when there are no Ashab al-Furood or Asabat. After the mother's death, the wealth becomes the property of her heirs. An orphan is one who loses their father before reaching puberty, not one who loses their mother.