Arthashastra
कृष्ण चतुर्दश्यां पुष्य योगिन्यां शुनो लग्नकस्य योनौ कालायसीं मुद्रिकां प्रेषयेत् ॥
On the fourteenth day of the dark half of the month combined with the star of Pushya, one should thrust into the organ of procreation of a dog or heat an iron seal (kataláyasam mudrikam).
english translation
kRSNa caturdazyAM puSya yoginyAM zuno lagnakasya yonau kAlAyasIM mudrikAM preSayet ॥
hk transliteration by Sanscript