Anandakanda 2.8.127

2.8.127

<vajramṛdūkaraṇa (5)>
eraṇḍavṛkṣamadhye tu tatphale vā kṣipetpavim /
māsamātrātsamuddhṛtya jānumadhye ca pūrvavat //

<Softening of diamond (5)> / One should place the diamond inside a castor plant or inside its fruit. / Extracting it after precisely one month, [one keeps it] between the knees as before;