Rasendracudamani 11.13

11.13

gandhakaṃ tatra nikṣipya cūrṇitaṃ sikatākṛtim /
chādayet pṛthudīrgheṇa kharpareṇaiva gandhakam //

Having placed sulphur pulverized like sand upon it,
One should cover the sulphur with a broad and long potsherd;