Anandakanda 1.10.40

1.10.40

samukhe pārade devi bījaṃ rasasamaṃ kramāt /
jārayet pūrvavaddevi catuḥṣaṣṭyaṃśakādikam //

O goddess, into mercury endowed with an opening, one should digest the seed equal to the mercury in succession,
beginning with a sixty-fourth part and so on, as before, O goddess.