Kamasutra 7.1.34

7.1.34

*uṣṭrasyāsthi bhṛṅgarājarasena bhāvitaṃ dagdham *añjanam uṣṭrāsthy *añjanikāyāṃ nihitam uṣṭrāsthiśalākayaiva sroto 'ñjanasahitaṃ puṇyaṃ cakṣuṣyaṃ vaśīkaraṇaṃ cety ācakṣate/

(g) If the bone of a camel is dipped into the juice of the plant eclipta prostata, and then burnt, and the black pigment produced from its ashes is placed in a box also made of the bone of a camel, and applied together with antimony to the eye lashes with a pencil also made of the bone of a camel, then that pigment is said to be very pure, and wholesome for the eyes, and serves as a means of subjugating others to the person who uses it. The same effect can be produced by black pigment made of the bones of hawks, vultures, and peacocks.