Mukhtasar Muslim (Abridged) 539 — Acceptance and increase of charity

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, who states: When the Messenger of Allah, peace and blessings be upon him, said: Whoever gives charity from his pure (lawful) earnings, even if it is a single date, Allah Almighty takes it in His right hand and nurtures it as one of you nurtures his colt or young she-camel, until it (the charity of a single date) becomes like a mountain or even greater than that.