Rasendrapurana 41.19

Rasendrapurāṇa 41.19

śūlādināśinīmudrikānirbhāṇādividhiḥ
tutthasattvaṃ nāgatāmraṃ hemaṃ caiva samāṃśakam
mudrikeyaṃ vidhātavyā śūlaghnā tatkṣaṇādbhavet