Sāttvata–Vṛṣṇi–Andhaka Vamśa
Genealogical Enumeration of the Yādava Clans
पूर्वस्यां दिशि नागानां भोजस्य त्वतिभावयन् / रूप्यकाञ्चनकक्षाणां स्रहस्राण्येकविंशतिः
pūrvasyāṃ diśi nāgānāṃ bhojasya tvatibhāvayan / rūpyakāñcanakakṣāṇāṃ srahasrāṇyekaviṃśatiḥ
In the eastern quarter, to magnify Bhoja’s splendor among the Nāgas, there were twenty-one thousand girdles wrought of silver and gold.