Anandakanda 2.7.90

2.7.90

<lohabhasmanāmamṛtīkaraṇavidhiḥ>
sarveṣāṃ māritānāṃ ca lohānāmabhrakasya ca /
vakṣyāmi paramaṃ guhyamamṛtīkaraṇaṃ śṛṇu //

<Procedure for immortalizing calcinated metallic ashes>
And for all incinerated metals and mica, / I will declare the supreme secret: hear the immortalization.