त एते कृतार्थाः सुखेन प्रभूतं चोपकुर्वन्ति ॥ कZ_०७.८.१५ ॥
ta ete kṛtārthāḥ sukhena prabhūtaṃ copakurvanti
Such allies, having achieved their purpose, reciprocate readily and also render substantial assistance.
Prioritize allies where assistance converts into success and then into dependable reciprocation—maximizing strategic return.