Arthashastra
चतुर् भक्त उपवासी कृष्ण चतुर्दश्यां भग्नस्य पुरुषस्य अस्थ्ना ऋषभं कारयेत्, अभिमन्त्रयेच् च एतेन ॥
Having fasted for four nights, one should on the fourteenth day of the dark half of the month get a figure of a bull prepared from the bone of a man, and worship it, repeating the above mantra.
english translation
catur bhakta upavAsI kRSNa caturdazyAM bhagnasya puruSasya asthnA RSabhaM kArayet, abhimantrayec ca etena ॥
hk transliteration by Sanscript