Anandakanda 1.24.126

1.24.126

chāyāśuṣkaṃ tato golaṃ mūkamūṣāgataṃ priye /
dattvā laghupuṭaṃ dhmātaḥ khoṭo bhavati śobhanaḥ //

Then the ball, dried in the shade, placed in a blind crucible, my dear, / subjected to a light pit-fire and blown, becomes an excellent solid mass.