Anandakanda 2.5.68

2.5.68

tṛtīyaḥ kharapākaḥ syād vālukāsadṛśaḥ priye /
<nirutthabhasmaparīkṣā>
pākaṃ varṇaṃ tathā gandhaṃ jñātvā lohasya vahnitaḥ //

the third is harsh cooking, resembling sand, O beloved.
<Testing of unrevivable ash>
Having known the stage of cooking, color, and likewise smell of the iron from the fire,