A few days ago, former NFL running back Brandon Jacobs made an appearance on the Tiki and Tierney radio show, making claims his former coach, Jim Harbaugh, “didn’t know what he was doing.”

You didn’t think Harbaugh was going to stand idly by, did you?

Fresh off his visit to Rome and meeting with the Pope, Harbaugh offered some biblical advice to his critic in a Saturday afternoon tweet:

In Jacobs’ rant on the Tiki and Tierney Show last week, he said Harbaugh “had no idea,” what to do at the NFL level and that his play-calling was “getting guys hurt.” Esentially, Jacobs was blaming Harbaugh for the San Francisco 49ers 2012 Super Bowl loss against the Baltimore Ravens.

One things Jacobs hasn’t learned, apparently, is that when you attack Harbaugh, he will fire back. It’s only a matter of time.