Musannaf Ibn Abi Shaybah

Hazrat Mak'hool narrates that Hazrat Aisha (may Allah be pleased with her) was asked, "In how many garments should a woman perform prayer?" She replied, "Go to Hazrat Ali (may Allah be pleased with him) and ask him, then come back to me." The questioner went to Hazrat Ali (may Allah be pleased with him) and asked him. He replied, "She should perform prayer in a fully covering shirt and a scarf." The questioner went back and informed Hazrat Aisha (may Allah be pleased with her), and she said, "He has spoken correctly."