Musnad Ahmad 5:338

Ya'qub narrated to us, my father narrated to us, from Salih, who said: Ibn Shihab, Ali ibn al-Husayn informed me that his father, Husayn ibn Ali, informed him that Ali ibn Abi Talib informed him that the Messenger of Allah, may Allah bless him and grant him peace, came to him and Fatimah at night, and he mentioned the like of it.