Joker: Ha ha ha! I'm so glad I dropped in. What are you two up to?

Batman: We're discussing Jeremiah 34. King Zedekiah made a covenant with the people of Jerusalem to free their Hebrew slaves, but he broke his promise.

Robin: That's right! So God sent Jeremiah to warn him that he would be punished for his treachery.

Joker: Ooh, sounds like a juicy plot twist! What happened then?

Batman: Well, the people of Jerusalem listened and freed their slaves, but the nobles and rulers refused. So God sent the Babylonian army to punish them. That's the gist of Jeremiah 34.

Robin: So remember, Joker: don't break your promises!

Joker: I'll keep that in mind. Ha ha ha!