حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، وَعَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ فِي الرِّكَازِ الْخُمُسُ ‏"‏ ‏.‏

Yahya related to me from Malik from Ibn Shihab from Said ibn al- Musayyab and from Abu Salama ibn Abd ar-Rahman from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace ,said, "There is a tax of a fifth on buried treasure." Translation Not Available

Book Ref: Muwatta Imam Malik Book 17 Hadith 589
Web Ref:  Muwatta Imam Malik Book 17 Hadith 9