Anandakanda 2.9.23

2.9.23

kṛṣṇe pakṣe pragalati dalaṃ pratyahaṃ caikamekaṃ śukle pakṣe prabhavati punar lambamānā latā syāt /
tasyāḥ kandaḥ kalayatitarāṃ pūrṇimāyāṃ gṛhīto baddhvā sūtaṃ kanakasahitaṃ dehalohaṃ vidhatte //

In the dark fortnight, one leaf drops off each day, and in the bright fortnight it grows again, becoming a hanging vine;
her tuber, especially gathered on the full moon, having bound quicksilver together with gold, accomplishes perfection of the body and transmutation of base metals.