(Batman and Robin are standing in the Batcave)

Batman: Robin, I believe our mission this time is to summarize the Bible.

Robin: Wow, that's a tall order, Batman! Where do we start?

Batman: We'll begin with Genesis 21.

Joker (suddenly appearing): Hey, what's going on here?

Batman: Joker! You're not welcome here!

Joker: Ah, always the party pooper, aren't you Batman?

Batman: Silence! We'll have none of your antics here. Now, Genesis 21 tells us that Sarah, Abraham's wife, bore him a son, Isaac. Sarah was so overjoyed that she gave Abraham a feast to celebrate.

Robin: That's great news!

Joker: Not so fast, kiddo. The celebration was short-lived because Sarah saw Ishmael, Abraham's son from his first marriage, mocking Isaac. Sarah demanded that Abraham send Ishmael away, which he did, along with Ishmael's mother. God promised to watch over Ishmael and make him a great nation, which he did.

Batman: Ishmael's descendants became the Ishmaelites, a powerful people in the Middle East.

Robin: Wow, what a story!

Joker: Yeah, it sure is... but I'm still not getting invited to the party. (sighs) Ah, what's the use? (vanishes)

Batman: That's a relief. Now, let's move on to the next chapter.