Musnad Ahmad 1153:1304

Muhammad ibn Fudayl narrated to us, he said: Habib ibn Abi Amrah narrated to us, from Aisha bint Talhah, from Aisha, she said: I said: "O Messenger of Allah, is there any Jihad upon women?" He said: "Yes, upon them is a Jihad in which there is no fighting: Hajj and Umrah."