Anandakanda 2.1.315

2.1.315

dhamitvā pātayetsatvaṃ krāmaṇaṃ cātiguhyakam /
<ākhupāṣāṇa>
mūṣakasyābhidhā pūrvaṃ pāṣāṇasyābhidhā tataḥ //

Having blown it with bellows, one should extract its essence; it causes penetration and is exceedingly secret. / <White arsenic> / First the name of a rat (ākhu), then the name of a stone (pāṣāṇa);