Musnad Ahmad 30:2333

Harun narrated to us, he said: Ibn Wahb narrated to me, from Haywah, from Ibn al-Had, from Muhammad ibn Ibrahim ibn al-Harith al-Taymi, from Abu Hurayrah, from the Messenger of Allah, may Allah bless him and grant him peace, that he said—if he indeed said it: "The jihad of the elderly, the weak, and the woman is Hajj and Umrah."