Musannaf Ibn Abi Shaybah 6383 — A slave woman praying without a head

Sayyiduna Anas bin Malik (may Allah be pleased with him) said: A slave woman came to Sayyiduna Umar bin al-Khattab (may Allah be pleased with him); he knew her as belonging to one of the Muhajirun or the Ansar. She had a large outer sheet on, with which she had veiled herself. Sayyiduna Umar asked her: Have you been freed? She said: No. He asked: Then why have you put on this sheet? Take it off your head; the sheet is only for the heads of free believing women. At this the slave woman began to hesitate and make excuses. So Sayyiduna Umar struck her on the head with his whip until she threw the sheet off her head.