Manusmriti

siva.sh/manusmriti/7/170

यदा प्रहृष्टा मन्येत सर्वास्तु प्रकृतीर्भृशम् । अत्युच्छ्रितं तथात्मानं तदा कुर्वीत विग्रहम् ॥ १७० ॥

sanskrit

But when he thinks all his subjects to be exceedingly contented, and (that he) himself (is) most exalted (in power), then let him make war.

english translation

yadA prahRSTA manyeta sarvAstu prakRtIrbhRzam | atyucchritaM tathAtmAnaM tadA kurvIta vigraham || 170 ||

hk transliteration by Sanscript