Urwah bin al-Zubayr narrated that Hakim bin Hizam (may Allah be pleased with him) asked the Messenger of Allah (peace and blessings be upon him) for one hundred camels, and he (peace and blessings be upon him) gave them to him. Then he asked for another hundred, and he (peace and blessings be upon him) gave those too. Then the Messenger of Allah (peace and blessings be upon him) said to him: "O Hakim bin Hizam! This wealth is green and sweet. Whoever takes it with a generous heart, it is blessed for him; and whoever takes it with greed, it is not blessed for him, and he is like one who eats but is never satisfied. And the upper hand is better than the lower hand, and in spending, begin with those in your care."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3069