Atharvaveda 5.18

Her the gods did not give thee for thee to eat, O lord of men (nṛpáti); do not thou, O noble, desire to devour (ghas) the cow of the Brahman, that is not to be eaten.

A noble hated of the dice, evil, self-ruined (-párājita)—he may eat the cow of the Brahman: "let me live today, not tomorrow."

Like an ill-poisonous adder enveloped with [cow-] hide, this cow of the Brahman, O noble, is harsh, not to be eaten.

Verily it conducts away his authority, smites his splendor; like fire taken hold of it burns up all; he who thinks the Brahman to be food, he drinks of Timātan poison.

Whatever insulter of the gods, desirous of riches, not from knowledge, slays him, thinking him gentle, in his heart Indra kindles a fire; both the firmaments (nábhas) hate him as he goes about.

The Brahman is not to be injured, like fire, by one who holds himself dear; for Soma is his heir, Indra his protector against imprecation.

He swallows down what (f.) has a hundred barbs; he is not able to tear it out—the fool who thinks of the food of Brahmans "I am eating what is sweet."

His tongue becomes a bow-string, his voice an [arrow-] neck, his teeth [become] shafts (nāḍīkā́) smeared with penance; with these the Brahman (brahmán) pierces the insulters of the gods, with bows having force from the heart [and] speeded by the gods.

The Brahmans have sharp arrows, have missiles; what volley (çaravyā̀) they hurl, it is not in vain; pursuing (anu-hā) with fervor and with fury, they split him down even from afar.

They that ruled, a thousand, and were ten hundreds, those Vāitahavyas, having devoured the cow of the Brahman, perished (parā-bhū).

The cow herself, being slain, pulled down those Vāitahavyas, who cooked the last she-goat of Kesaraprābandhā (?).

Those hundred and one fellows (? janátā) whom the earth shook off, having injured the progeny of the Brahmans, perished irretrievably.

The insulter of the gods goes about among mortals; he becomes one who has swallowed poison, [becomes] mainly composed of bones; he who injures the Brahman, the connection of the gods, he goes not to the world to which the Fathers go.

Agni verily our guide. Soma is called [our] heir, Indra slayer of imprecation (?): so know the devout that.

Like an arrow smeared [with poison], O lord of men, like an adder, O lord of cattle—that arrow of the Brahman is terrible; with it he pierces the insulting.