Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
كتاب الخراج والإمارة والفىء
Chapter 40: Ar-Rikaz (Buried Treasure) And The Levy Due On It
Al-Miqdad went to Baqi' al-Khabkhabah for a certain need. He found a mouse taking out a dinar from a hole. It then continued to take out dinars one by one until it took out seventeen dinars. It then took out a red purse containing a dinar. There were thus eighteen dinars. He took them to the Prophet (ﷺ), informed him and said to him: Take its sadaqah. The Prophet (ﷺ) asked him: Did you extend your hand toward the hole? He replied: No. The Messenger of Allah (ﷺ) then said: May Allah bless you in it.
Chapter 41: Digging Up Ancient Graves In Which There Is Wealth
When we went out along with the Messenger of Allah (ﷺ) to at-Ta'if we passed a grave. I heard the Messenger of Allah (ﷺ) say: This is the grave of AbuRighal. He was in this sacred mosque (sanctuary) protecting himself (from punishment). When he came out, he suffered the same punishment which his people suffered at this place, and he was buried in it. The sign of it is that a golden bough was buried with him. If you dig it out, you will find it with him. The people hastened to it and took out the bough.