Manusmriti

siva.sh/manusmriti/7/144

क्षत्रियस्य परो धर्मः प्रजानामेव पालनम् । निर्दिष्टफलभोक्ता हि राजा धर्मेण युज्यते ॥ १४४ ॥

sanskrit

The highest duty of a Kshatriya is to protect his subjects, for the king who enjoys the rewards, just mentioned, is bound to (discharge that) duty.

english translation

kSatriyasya paro dharmaH prajAnAmeva pAlanam | nirdiSTaphalabhoktA hi rAjA dharmeNa yujyate || 144 ||

hk transliteration by Sanscript