The Messenger of Allah ﷺ said regarding buried treasure, "A fifth is due on it."
حدثنا محمد بن ميمون المكي وهشام بن عمار قالا حدثنا سفيان بن عيينة عن الزهري عن سعيد وأبي سلمة
أن رسول الله ﷺ قال في الركاز الخمس
No references are available.
Muslim narrated it in the Book of Legal Punishments, Chapter on the Injury Caused by an Animal, a Mine, or a Well Being Without Liability, hadith no. 1710, from the hadith of Sufyan through this chain.