Narasimhapurana 58.2

58.2

rājyasthaḥ kṣatriyaś caiva prajā dharmeṇa pālayet
kuryād adhyayanaṃ samyag yajed yajñān yathāvidhi //

Established in his kingdom, a kṣatriya should protect his subjects righteously; / he should properly undertake Vedic study and offer sacrifices according to rule;