Mbh 3.15.2b

And the land around the city for full two miles was rendered uneven, and holes and pits were dug thereon, and combustibles were secreted below the surface. Our fort, O sinless one, is naturally strong and always well-defended and filled with all kinds of weapons! And in consequence of the preparations made, our city was more prepared than ever to meet the foe. And, O chief of the Bharatas, in consequence of all this, the city looked like that of Indra himself. And, O king, at the time of Salwa’s approach, nobody could either enter or leave the town of the Vrishnis and the Andhakas without presenting the sign that had been agreed upon. And all the streets of the town and the open spaces were filled with numerous elephants and horses! And, O thou of mighty arms, the combatants were all specially gratified with allowances and wages, and rations, and weapons, and dresses! And amongst the combatants there was none who was not paid in gold, and none who was not paid at all, and none who was not somehow obliged, and none who was not of tried valour! And, O thou of eyes like lotus-leaves, it was thus Dwaraka, abounding in well-ordered arrangements, was defended by Ahuka (Ugrasena)!’”