Babylonian Talmud, Ketubot 67b

Mar Ukba had a poor man in his neighborhood into whose door-socket he used to throw four zuz everyday. One day [the poor man] thought: ‘I will go and see who does me this kindness.’ On that day [it happened] that Mar Ukba was late at the house of study and his wife was coming home with him. As soon as [the poor man] saw them moving the door he went out after them, but they fled from him and ran into a furnace from which the fire had just been swept. Mar Ukba’s feet were burning and his wife said to him: “Raise your feet and put them on mine.” As he was upset, she said to him, “I am usually at home and my benefactions are more direct.” [Translation by Shuli Passow]