The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 888
Ibn 'Umar reported: The Messenger of Allah (may peace be upon him) said: Do not prevent women from going to the mosque at night. A boy said to 'Abdullah b. Umar: We would never let them go out, that they may not be caught in evil. He (the narrator) said: Ibn Umar reprimanded him and said.. I am saying that the Messenger of Allah (may peace be upon him) said this, but you say: We would not allow!