Mbh 7.98.4b

That uncrossable, wide, and limitless ocean of cars, incapable of being agitated, had arrows for its current, standards for its eddies, elephants for its crocodiles, foot-soldiers for its countless fishes, the blare of conchs and the beat of drums for its roar, cars for its surging waves, head-gears of combatants for its tortoises, umbrellas and banners for its froth, and the bodies of slain elephants for its (submarine) rocks: Partha resisted with his arrows, the approach of the sea like a continent. Then, in course of that battle, the mighty-armed Janardana, fearlessly addressing that dear friend of his, that foremost of men, viz., Arjuna, said unto him, “There is no well here in the field of battle, O Arjuna, for the steeds to drink from. The steeds want water for drink, but not for a bath.” Thus addressed by Vasudeva, Arjuna cheerfully said, “Here it is!” And so saying, he pierced the earth with a weapon and made an excellent lake from which the steeds could drink. And that lake abounded in swans and ducks, and was adorned with Chakravakas. And it was wide and full of transparent water, and abounded in full-blown lotuses of the finest species. And it teemed with diverse kinds of fish. And fathomless in depth, it was the resort of many a Rishi. And the celestial Rishi, Narada, came to have a look at that lake created there in a moment. And Partha, capable of achieving wonderful works like (the celestial artificer) Tvashtri himself, also constructed there an arrowy hall, having arrows for its beams and rafters, arrows for its pillars, and arrows for its roof. Then Govinda smiling in joy, said, “Excellent, Excellent,” upon seeing the high-souled Partha create that arrowy hall.’”