It is narrated from Sayyiduna Jabir bin Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: A group of Muslims or believers will conquer the treasures present in the white palaces of the family of Kisra. Also, Sayyiduna Jabir (may Allah be pleased with him) said: I also heard the Prophet (peace and blessings be upon him) say that Allah Almighty has named Madinah Munawwarah as Tayyibah.
Hadith Referenceالفتح الربانی / كتاب الفضائل / 12661