Kautilya's Arthashastra 9.1.7

9.1.7

prabhāvavān utsāhavantaṃ rājānaṃ prabhāvenātisaṃdhatte tadviśiṣṭam anyaṃ rājānam āvāhya bhṛtvā krītvā pravīrapuruṣān //

No, says Kautilya, he who is possessed of power overreaches, by the sheer force of his power, another who is merely enthusiastic. Having acquired, captured, or bought another enthusiastic king as well as brave soldiers, he can make his enthusiastic army of horses, elephants, chariots, and others to move anywhere without obstruction. Powerful kings, whether women, young men, lame or blind, conquered the earth by winning over or purchasing the aid of enthusiastic persons.