Anandakanda 1.16.78

1.16.78

samāṃśaṃ lohacūrṇaṃ ca lepanātkeśarañjanam /
nāgadaṇḍena patrāṇi koraṇṭasya ca mardayet //

and an equal part of iron powder: through application as a paste, it dyes the hair.
And one should pound the leaves of koraṇṭa with a nāgadaṇḍa stalk;