Musnad Ahmad 30:2619

Waki' narrated to us, he said: Hammad ibn Salamah narrated to us, from Muhammad ibn Ziyad, from Abu Hurairah, he said: The Prophet, peace and blessings of Allah be upon him, said: "The needy person is not the one who goes around among you, whom a morsel or two morsels turn away. Rather, the needy person is the one who refrains from asking."