Rasendrapurana 47.75

Rasendrapurāṇa 47.75

nikṣipya vajramūṣāyāṃ baṃkanālena saṃdhamet
stokaṃ stokaṃ dadannāgaṃ samadvitricaturguṇam
yāvatsakomalaṃ tāvatsattvaṃ ca yojayedrase