It is narrated from Sayyiduna Atiyyah (may Allah be pleased with him) that he came to the Messenger of Allah (peace and blessings be upon him) with the delegation of his people. When they went in to the Messenger of Allah (peace and blessings be upon him), he (peace and blessings be upon him) asked: "Has anyone besides you come?" They said: Yes, a young man from among us whom we left with our baggage. He (peace and blessings be upon him) said: "Send for him." (Atiyyah said:) When I came to him (peace and blessings be upon him), and the Companions were also present, he (peace and blessings be upon him) turned towards me and said: "The giving hand is the upper one, and the asking hand is the lower one; and as long as you are not in need, do not ask, for the wealth of Allah is both asked for and given."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14519