1647 - وَ رَوَى أَحْمَدُ بْنُ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ أَبِي اَلْحَسَنِ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ قَالَ: سَأَلْتُهُ عَمَّا يَجِبُ فِيهِ اَلْخُمُسُ مِنَ اَلْكَنْزِ فَقَالَ «مَا تَجِبُ اَلزَّكَاةُ فِي مِثْلِهِ فَفِيهِ اَلْخُمُسُ ».
Hadith.1647 - Ahmad ibn Muhammad ibn Abi Nasr narrated from Abu al-Hasan Imam Ali ibn Musa Ar-Ridha 
:
I asked him about what amount of a buried treasure (kanz) makes Khums obligatory.
Imam replied: "Whatever amount requires Zakat in its equivalent also requires Khums."
