ताभ्यां बहुगुणविशिष्टे लाभे यायात् ॥ कZ_०९.४.०३ ॥
tābhyāṃ bahu-guṇa-viśiṣṭe lābhe yāyāt.
One should proceed (incur those losses/expenditures) only toward a gain distinguished by many-fold advantage relative to them.
Do not spend men or material unless the expected gain is decisively larger—i.e., a clear surplus after accounting for attrition and resource depletion.