Imam Malik's Muwatta, Chapter: Sadaqa

Yahya related to me that Malik said, "I heard that a beggar asked for food from Aisha, umm al-muminin, while she had some grapes. She told someone to take him one grape. He began to look in amazement. Aisha said, 'Are you amazed? How many atoms' weights do you see in this grape?' " (referring to Sura 99 ayat 7).