Simak narrates from Sayyiduna Jabir bin Samurah (may Allah be pleased with him) that he heard the Prophet (peace and blessings be upon him) say: "A band of the Muslims will certainly conquer the treasure of the White Palace of the family of Kisra (Chosroes) - or he said: the one in the White Palace."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1889