Shiva Purana
वृषाणां वृषणान्ये च पापिष्ठा गालयंति च ॥ वाहयंति च गां वंध्यां महानारकिनो नराः ॥ ३४ ॥
The most sinful persons who castrate bulls by squeezing out their scrotum and those who make heifers draw carts are great sinners sure to fall into hell.
english translation
vRSANAM vRSaNAnye ca pApiSThA gAlayaMti ca ॥ vAhayaMti ca gAM vaMdhyAM mahAnArakino narAH ॥ 34 ॥
hk transliteration by Sanscript