Mbh 8.41.1a

"Sanjaya said, 'Hearing, O sire, these words of Radha's son who delighted in battle, Shalya once more addressed Karna, citing an example, "I am born in the race of men who performed great sacrifices, who never retreated from battle, who were kings whose coronal locks underwent the sacred bath. I am also myself devoted to the practice of virtue. Thou, O Vrisha, seemest to be like one that is intoxicated with spirits. For all that, I will, from friendship, seek to cure thy erring and intoxicated self. Listen, O Karna, to this simile of a crow that I am about to narrate. Having heard it, thou mayest do what thou choosest, O thou that art destitute of intelligence and that art a wretch of thy race. I do not, O Karna, remember the slightest fault in me for which, O thou of mighty arms, thou mayst desire to slay my innocent self. I must tell thee what is for thy good and what is for thy ill, acquainted as I am with both, especially as I am the driver of thy car and desirous of the good of king Duryodhana. What land is level and what not, the strength or weakness of the warrior (on my vehicle), the fatigue and faintness, at all times, of the steeds and the warrior (I am driving), a knowledge of the weapons that are available, the cries of animals and birds, what would be heavy for the steeds and what exceedingly heavy for them, the extraction of arrows and the curing of wounds which weapons counteract which, the several methods of battle, and all kinds of omens and indications, I who am so nearly connected with this car, being none else than its driver, should be familiar with. For this, O Karna, I narrate this instance to thee once more. There lived on the other side of the ocean a Vaishya who had abundance of wealth and corn. He performed sacrifices, made liberal gifts, was peaceful, devoted to the duties of his own order, and pure in habits and mind. He had many sons whom he loved, and was kind unto all creatures.