Sahih Muslim Book 9, Hadith Number 3535.

Chapter: One who is divorced by three pronouncements of whose husband has died can get out of her house for a need during her period of ‘Idda.

Jabir b. ‘Abdullah (Allah be pleased with them) reported: My maternal aunt was divorced, and she intended to pluck her dates. A person scolded her for having come out (during the period of ‘Idda). She came to Allah’s Prophet (may peace be upon him.) and he said: Certainly you can pluck (dates) from your palm trees, for perhaps you may give charity or do an act of kindness.