Arthashastra
त्रि रात्र उपोषितः पुष्येण कालायसीम् अञ्जनीं शलाकां च कारयेत् ॥
Having taken it out on the day of the star of Pushya and having anointed one's own eyes with that ointment, one can walk invisible to others.
english translation
tri rAtra upoSitaH puSyeNa kAlAyasIm aJjanIM zalAkAM ca kArayet ॥
hk transliteration by Sanscript