Anandakanda 1.2.226

1.2.226

naṣṭendriyārthānajñānān trātā tvamasi pārada /
sarvauṣadhībhyo'pyadhiko hyaṇumātropayogataḥ //

You are the protector of the ignorant whose sensory faculties are destroyed, O mercury!
Indeed, you are superior to all medicinal plants, even through the use of an atom-sized dose.