The national warehouse chain has apologized for labeling Bibles in a Simi Valley, Calif. store as fiction, calling it an error that they are working quickly to correct.

“We deeply regret the mislabeling of the Bible and meant no offense to anyone,” the company wrote in an email received by several customers. “The buyer has let us know that this was an error and the books are being pulled off the shelves to be re-marked.”