Maliks Muwatta Book 058, Hadith Number 005.

Section : Stimulation of Desire for Sadaqa.

Yahya related to me from Malik that he heard that a beggar asked A'isha, the wife of the Prophet, may Allah bless him and grant him peace, for something while she was fasting and there was only a loaf of bread in her house. She said to her female mawla, "Give it to him." The mawla protested, "You will not have anything to break your fast with." A'isha repeated, "Give it to him," so she did so. When evening came, the people of a house or a man who did not usually give to them, gave them a sheep and some food to go with it. A'isha, umm al-muminin, called her mawla and said, "Eat from this. This is better than your loaf of bread."