How is the obligation of maintenance apportioned among multiple heirs?

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Maintenance is incumbent upon the heir according to the proportion of their inheritance from the person who requires maintenance. If there are two heirs, maintenance is split according to their inheritance shares. If there are three or more, the maintenance is divided among them in proportion to their inheritance shares. This is supported by the Quranic verse: {And upon the heir is similar to that} (Quran 2:233), which follows the obligation of maintenance upon the father. This principle establishes that the mother and paternal grandfather, when both inheriting from a child, share the maintenance in the ratio of their inheritance shares (mother one-third, grandfather the remainder), following Abu Hanifa's view. The mother is an heir, making her liable based on the text, and since this obligation arises from kinship, it is not exclusive to the paternal grandfather like paternal inheritance.