तस्मात्प्रभूतोदके देशे वर्षति च हस्तिबलप्रायो यायात् ॥ कZ_०९.१.४८ ॥
tasmāt prabhūtodake deśe varṣati ca hastibalaprāyo yāyāt
Therefore, in a region with plentiful water—and when it is raining—one should march with a force mainly of elephants.
Given elephants’ dependence on water and susceptibility to heat-related ailments, the state should deploy elephant-heavy forces only where environmental conditions sustain them.