Hazrat Mujahid (may Allah have mercy on him) narrates that Hazrat Ali (may Allah be pleased with him) said: There is one verse upon which neither anyone before me acted nor will anyone after me act upon it. I had one dinar which I sold for ten dirhams. Whenever I would converse privately with the Messenger of Allah (peace and blessings be upon him), I would give one dirham in charity, until those dirhams were finished. Then he (may Allah be pleased with him) recited this verse: O you who believe! When you wish to converse privately with the Messenger, then before your private conversation, present some charity.