The Messenger of Allah ﷺ said, "The best charity is that given to a relative who harbors hidden enmity toward you."
قال رسول الله ﷺ: أفضل الصدقة على ذي الرحم الكاشح.
Reported by Hakim (1/406), and from him Bayhaqi (7/27), via the route of Abdul-Razzaq, [who said], Ma'mar informed us, from Zuhri, from Humayd bin Abdul-Rahman, from his mother Umm Kulthum bint Uqba, who narrated it.Hakim said, "Sahih according to the criterion of Muslim." The discussion of this is given at length in the book on zakat. Hadiths have come regarding the sponsorship of orphans in general, including what appears in the Sahih.