Anandakanda 1.7.139

1.7.139

ṣoḍaśābde'ṣṭasiddhiḥ syātsatyaṃ satyaṃ maheśvari /
<kāntadrutikramaḥ>
suvarṇadrutivatkāntadrutiḥ syātpūrvavatpriye //

in the sixteenth year, the eight alchemical perfections will arise; this is true, truly true, O Maheśvarī!
<Procedure for liquefaction of magnet iron>
Just like the liquefaction of gold, the liquefaction of magnet iron is done as before, my dear.