Garudapurana 1.174.19

1.174.19

jyotiṣmatīñca saṃbhṛtya tailaṃ dhīro vipācayet /
etanniṣyandanaṃ tailaṃ bhṛśaṃ dadyādbhagandare //

and collecting jyotiṣmatī, the wise physician should cook an oil. / One should apply this trickling oil copiously in fistula-in-ano;