Rasendrapurana 2.63

Rasendrapurāṇa 2.63

bhūdharapuṭalakṣaṇam
vahnimitrātkṣitau samyak nikhaned dvyaṃgulādadhaḥ !
upariṣṭātpuṭaṃ yatra puṭaṃ taddhadharāhvayam