Kautilya's Arthashastra 7.10.4

7.10.4

bhūmilābhaṃ śatrukarśanaṃ pratāpaṃ ca hi prāpnoti //

The acquisition of rich land being equal, whoever acquires such land by putting down a powerful enemy overreaches the other; for not only does he acquire territory, but also destroys an enemy and thereby augments his own power. True, there is beauty in acquiring land by putting down a weak enemy; but the land acquired will also be poor, and the king in the neighbourhood who has hitherto been a friend, will now become an enemy.