Mbh 12.262.4e

When they earn a living by such a sinful course, what scruples need they feel in selling dead carcases? The goat is Agni. The sheep is Varuna. The horse is Surya. Earth is the deity Virat. The cow and the calf are Soma. The man who sells these can never obtain success. But what fault can attach to the sale of oil, or of Ghrita, or honey, or drugs, O regenerate one? There are many animals that grow up in ease and comfort in places free from gnats and biting insects. Knowing that they are loved dearly by their mothers, men persecute them in diverse ways, and lead them into miry spots abounding with biting insects. Many draft animals are oppressed with heavy burthens. Others, again, are made to languish in consequence of treatment not sanctioned by the scriptures. I think that such acts of injury done to animals are in no way distinguished from foeticide. People regard the profession of agriculture to be sinless. That profession, however, is certainly fraught with cruelty. The iron-faced plough wounds the soil and many creatures that live in the soil. Cast thy eyes, O Jajali, on those bullocks yoked to the plough. Kine are called in the Srutis the Unslayable. That man perpetrates a great sin who slays a bull or a cow.[1161] In days of yore, many Rishis with restrained senses addressed Nahusha, saying, "Thou hast, O king, slain a cow which is declared in the scriptures to be like unto one's mother. Thou hast also slain a bull, which is declared to be like unto the Creator himself.[1162] Thou hast perpetrated an evil act, O Nahusha, and we have been exceedingly pained at it." For cleansing Nahusha, however, they divided that sin into a hundred and one parts and converting the fragments into diseases cast them among all creatures.[1163] Thus, O Jajali, did those highly-blessed Rishis cast that sin on all living creatures, and addressing Nahusha who had been guilty of foeticide, said, "We shall not be able to pour libations in thy sacrifice."