In plain words
The poet, to the people of the world: Cruel hell is dreadful to see, and what is done there [by Yama's servants] is worse still, beyond bearing. Knowing this, before it comes upon you, draw near and praise the Lord who holds the sharp-sounding conch, who tore apart the mouth of the maned one [Kēśi], and who drank the poison from the breast [of Pūtanā].