In plain words
The poet, to the people of the world: Mark this: those who bow at the feet of the Lord who wounded his own chest so that the sin [of slaying a brāhmaṇa] might leave the one with the white twisted thread on his chest [Śiva], who received alms in the skull of the one who learned the four Vedas with their melodies [Brahmā], will rule this earth together with the joy of the immortals [the nityasūris].