Rasamanjari 8.27

8.27

kāśmaryā mūlamādau sahacarakusumaṃ ketakīnāṃ ca mūlaṃ lauhaṃ cūrṇaṃ sabhṛṅgaṃ triphalajalayutaṃ tailamebhir vipakvam /
kṛtvā vai lohabhāṇḍe kṣititalanihitaṃ māsam ekaṃ nidhāya keśāḥ kāśaprakāśā bhramarakulanibhā lepanād eva kṛṣṇāḥ //

First the root of kāśmarī, sahacara flowers, and root of ketakī, / iron powder with bhṛṅgarāja, and oil cooked with these along with water of the three myrobalans: / having placed it in an iron vessel and kept it buried in the earth for one month, / hair white as kāśa grass becomes black as a swarm of bees simply from smearing.