The Good Book

The Good Book is a translation of the Bible, one of many which the Flanders family own.

History
When the Flanders family missed a meal (due to Homer having stolen some food from them), Rod's stomach started rumbling with hunger and Rod said, "I think my tummy's speaking in tongues!" Ned looked up from reading The Good Book and told Todd to get his translating notepad.

Behind the laughter

 * "The Good Book" is a common nickname for the Bible.
 * and are common practices in many  churches.