In the Name of Allah , the Compassionate , the Merciful
Imam Sadiq [a] said: "Whoever satiates a hungry believer so that the one is satisfied fully, neither a human being among people nor a near-stationed angel nor a divine Messenger knows how great his reward is in the Hereafter except Allah, the Lord of the Worlds." Then, he added: "Feeding a hungry Muslim is from among the means of forgiveness." After that he recited the word of Allah, Almighty and Glorious: "Or the feeding on a day of hunger, of an orphan near of kin, or to the indigent (down) in the dust." (Sura Balad, No. 90, verses 14 to 16).
Al-Kafi, vol. 2, p. 201