Musnad Ahmad 907:190

'Abd al-Razzaq narrated to us, Isra'il and Abu Nu'aym narrated to us, he said: Isra'il narrated to us, from Simak, that he heard Jabir ibn Samurah say: The Messenger of Allah (peace and blessings of Allah be upon him) said: "A group of Muslims will surely conquer the treasures of Chosroes, which—" Abu Nu'aym said: "which are in the White [Palace]." Jabir said: "So I was among them, and I received a thousand dirhams."