esa dharma-bhrtam srestho
esah-this King Prthu; dharma-bhrtam-of persons executing religious activities; sresthah-the best; lokam-the whole world; dharme-in religious activities; anuvartayan-engaging them properly; gopta-the protector; ca-also; dharma-setunam-of the principles of religion; sasta-the chastiser; tat-paripanthinam-of those who are against religious principles.