Rikaz refers to ancient buried treasure.
حدثنا يحيى بن أيوب حدثنا عباد بن العوام عن هشام
الركاز الكنز العادي
No references are available.
[Its isnad is daif]. Ibn Abu Shayba narrated it, 3/225, hadith 10776, from the hadith of Abbad bin Awwam, with this chain. Hisham bin Hassan is a mudallis and he narrated with "an."