बन्धुमुख्यप्रग्रहः प्रतिग्रहः ॥ कZ_०७.१७.११ ॥
bandhu-mukhya-pragrahaḥ pratigrahaḥ
Un «gage en contrepartie» (pratigraha) est la prise/la rétention (pragraha) d’un parent ou d’un homme principal (dirigeant).
It creates enforceable reciprocity: by holding a high-value person, the state gains leverage to deter breach and to compel performance without immediate war.