Sa'id bin al-Musayyib and Urwah bin al-Zubayr narrated from Hakim bin Hizam (may Allah be pleased with him), who said: I asked the Messenger of Allah (peace and blessings be upon him) for wealth and insisted, and he gave me; then I asked him and he gave me; then he said: "O Hakim! How objectionable is your (repeated) asking! This wealth is green and sweet, and at the same time it is the dirt of people's hands. Whoever takes it with generosity of 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. The hand of Allah is above the hand of the giver, the hand of the giver is above the hand of the one who receives, and the hand of the one who receives is the lowest of all hands."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3068