Musnad Ahmad 907:140

Abdullah narrated to us, Imran ibn Bakkar al-Homsi narrated to me, Ahmad—meaning Ibn Khalid al-Wahbi—narrated to us, Qays narrated to us, from Simak, from Jabir ibn Samurah, who said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "A group of the Muslims shall surely conquer the white palace of the family of Chosroes."