Narrated Aisha, Ummul Mu'minin: The Prophet (ﷺ) said: The divorce of a slave-woman consists in saying it twice and her waiting period is two menstrual courses (qur') AbuAsim said: A similar tradition has been narrated to me by Muzahir and al-Qasim on the authority of Aisha from the Prophet (ﷺ), except that he said: And her waiting period ('iddah) is two courses. Abu Dawud said: This tradition is obscure

English translation · Sunan Abu Dawud