Urwah (may Allah have mercy on him) said: On the day of Hunayn the Prophet (peace and blessings be upon him) gave Sayyiduna Hakim bin Hizam (may Allah be pleased with him) a gift; he considered it little, so he (peace and blessings be upon him) increased it. He said: O Messenger of Allah! Which of your two gifts is better? He (peace and blessings be upon him) said: "The first." Then the Prophet (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 and in a good manner of consuming it, it is blessed for him; and whoever takes it with greed and an ill intent, 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." Sayyiduna Hakim (may Allah be pleased with him) said: And is it the same when taking from you, O Messenger of Allah? He (peace and blessings be upon him) said: "Even from me." Sayyiduna Hakim (may Allah be pleased with him) said: By the One who sent you with the truth, after you I will never take anything from anyone. The narrator said: So he accepted neither a stipend nor a gift until he died. Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) used to say: "O Allah! I call You to witness regarding Hakim bin Hizam that I invite him to take his due from this wealth, but he refuses." Sayyiduna Hakim (may Allah be pleased with him) would say: By Allah, I will take nothing from you or from anyone else. So when he died, he was among the wealthiest people of Quraysh.
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3065