बह्वाबाधं वा यात्रां प्रेषयेत्मित्रकुलं वा ॥ कZ_०५.६.०९ ॥
bahvābādhaṃ vā yātrāṃ preṣayet mitrakulaṃ vā
He may dispatch (them) on a campaign or expedition that entails many hardships—or send them to an allied family/household.
It removes a potential troublemaker from the center, tests loyalty, and reduces their capacity to organize intrigue at court.
Allied custody functions as supervised placement—politically safer than imprisonment and diplomatically useful.