Arthashastra
तेषु यथा स्व बल वृद्धि करं कर्म प्रयुञ्जीत ॥
In such lands, he should undertake such works as he considers to be conducive to his power and prosperity.
english translation
teSu yathA sva bala vRddhi karaM karma prayuJjIta ॥
hk transliteration by Sanscript