Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "A group of the Muslims, or he said: of the believers, will surely conquer the treasure of the family of Kisra which is in the White Palace."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1962