question #3 Sahih Muslim 1014b, Book 12, Hadith 80 : What analogy is used to describe the growth of charity given sincerely in Islamic tradition?

No one gives Sadaqa of a date out of his honest earning, but Allah accepts it with His Right Hand, and then fosters it as one of you fosters the colt or a young she-camel, till it becomes like a mountain or even greater.