Kautilya's Arthashastra 13.2.40

13.2.40

pratipannaṃ gahanam ekāyanaṃ vātinīya ghātayeyuḥ, baddhvā vāpahareyuḥ //

When the enemy is fond of elephants, spies may delude him with the sight of a beautiful elephant reared by the officer in charge of elephant forests. When he desires to capture the elephant, he may be taken to a remote desolate part of the forest, and killed or carried off as a prisoner. This explains the fate of kings addicted to hunting.