Rasarnava 11.170

11.170

karañjatailamadhye tu daśarātraṃ nidhāpayet
dīptāgrabhāgāṃ tāṃ vartiṃ saṇḍaśyā tu vidhārayet //

one should keep it for ten nights in karañja oil.
One should hold that wick, with its tip lit, with pincers;