Anandakanda 1.7.103

1.7.103

triyāmamathanādeva kāntātsatvaṃ patecchuci /
tatsarvaṃ kaṇaśaḥ kṛtvā kācādyairauṣadhaiḥ samaiḥ //

From three yāmas of heating alone, pure essence will fall from the magnet iron. / Having reduced all of that to fine grains, [mixing it] with equal parts of flux drugs such as glass,