Kautilya's Arthashastra 7.14.26

7.14.26

teṣām alābhe bandhumitrakulebhyaḥ samārjanam //

In the absence of such sources of his own, he should acquire them from some one among his relatives and friends. If he is destitute of an army, he should, as far as possible, attract to himself the brave men of corporations, of thieves, of wild tribes, of Mlechchhas, and of spies who are capable of inflicting injuries upon enemies.