أَفْضَلُ الصَّدَقَةِ أَنْ تُشْبِعَ كَبِدًا جَائِعًا
The best charity is to feed a hungry living being until satisfied.
Source: Bayhaqi.
أَفْضَلُ الصَّدَقَةِ means “the best charity”; أَنْ تُشْبِعَ means “to satisfy or feed fully”; and كَبِدًا جَائِعًا literally says “a hungry liver,” a figurative reference to a hungry living creature.
تُشْبِعَ is a present-tense verb addressed to “you”; its form after أَنْ is subjunctive (manṣūb). The practical sense goes beyond offering a token amount: the aim is to relieve hunger.
This teaching can encompass suitable care for hungry humans and hungry animals alike.