Cakradatta (Cikitsasangraha) 61.63

61.63

dagdhvā śaṅkhaṃ kṣipedrambhāsvarase tattu peṣitam .
tulyālaṃ lepato hanti romaguhyādisambhavam .. 63 ..

Having incinerated a conch shell, one should throw it into plantain juice; when ground with that / and an equal amount of orpiment, it destroys by application hair arising on the pubes and other parts.