The Compendium of Caraka 6.7.118

6.7.118

tenāliptaṃ sidhmaṃ &saptāhādvyeti tiṣṭhato gharme/
māsānnavaṃ kilāsaṃ snānaṃ muktvā viśuddhatanoḥ//
iti sidhme lepaḥ/
&`saptāhāddharmasevino vyeti' iti pā-.
sarṣapakarañjakoṣātakīnāṃ tailānyatheṅgudīnāṃ ca/
kuṣṭheṣu hitānyāhustailaṃ yaccāpi khadirasārasya//

smeared with it, sidhma disappears after seven days for one standing in the sun, / and fresh kilāsa after a month, abstaining from bathing, for one whose body has been purified. / Thus the paste for sidhma. / Mustard, karañja, and koṣātakī oils, and also those of iṅgudī, / are said to be beneficial in kuṣṭhas, as well as the oil of heartwood of khadira.