Atharva Veda 6.138

tvaṃ vīrudhāṃ śreṣṭhatamābhiśrutāsy oṣadhe imaṃ me adya puruṣaṃ klībam opaśinaṃ kṛdhi

To make a certain man impotent

Thou art listened to, O herb, as the most best of plants; make thou now this man for me impotent (klībá), opaçá-wearing.

klībaṃ kṛdhy opaśinam atho kurīriṇaṃ kṛdhi athāsyendro grāvabhyām ubhe bhinattv āṇḍyau

Do thou make him impotent, opaçá-wearing, likewise make him kurī́ra-wearing; then let Indra with the (two) pressing-stones split both his testicles.

klība klībaṃ tvākaraṃ vadhre vadhriṃ tvākaram arasārasaṃ tvākaram kurīram asya śīrṣaṇi kumbaṃ cādhinidadhmasi

Impotent one, I have made thee impotent; eunuch (vádhri), I have made thee eunuch; sapless one, I have made thee sapless; the kurī́ra and the kúmba we set down upon his head.

ye te nāḍyau devakṛte yayos tiṣṭhati vṛṣṇyam te te bhinadmi śamyayāmuṣyā adhi muṣkayoḥ

The two god-made tubes that [are] thine, in which stands thy virility, those I split for thee with a peg, on yon woman's loins (muṣká).

yathā naḍam kaśipune striyo bhindanty aśmanā evā bhinadmi te śepo 'muṣyā adhi muṣkayoḥ

As women split reeds with a stone for a cushion, so do I split thy member, on yon woman's loins.