Matrikabhedatantra 8.6

8.6

pāradasya śatāṃśaikaṃ lakṣmīnārāyaṇaṃ na hi /
pakāraṃ viṣṇurūpaṃ ca ākāraṃ kālikā tathā //

A single hundredth part of mercury is indeed Lakṣmīnārāyaṇa: / the letter 'pa' has the form of Viṣṇu, and the vowel 'ā' is Kālikā;