Musnad Ahmad 1153:367

Hassan narrated to us, Ibn Lahi'ah narrated to us, al-Walid ibn Abi al-Walid narrated to us, he said: I heard al-Qasim ibn Muhammad informing from Aisha, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "There is no good in the gathering of women, except in a mosque or at the funeral of one killed."