Muwatta Malik #473
The Qibla
Yahya related to me from Malik that he had heard that Abdullah
ibn Umar said, "The Messenger of Allah, may Allah bless him and grant
him peace, said, 'Do not forbid the female slaves of Allah from (going
into) the mosques of Allah.' "
About Muwatta Malik
This hadith is #473 from Muwatta Malik, in the Book of The Qibla. Muwatta Malik contains 1,985 hadiths across 61 books.