Musnad Ahmad 1153:450

Sulayman ibn Dawud narrated to us, he said: Humayd ibn Mihran narrated to us, from Muhammad ibn Sirin, from Imran ibn Hattan as-Sadusi, from Aisha, that she asked the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, is there Jihad upon women?" He said: "Hajj and Umrah; it is the Jihad of women."