First Nephi 16
The event of the broken bow as detailed in chapter 16 shows yet another example of a trial that was impossible, except someone should have faith. Just like with the brass plates, they were unobtainable without the actions of faith. In this case, the entire camp might have died of hunger if it weren't for Nephi's faith. Nephi was the last one standing. And what could be more stressful than being depended on to provide food to a hungry extended family, because if you don't, no one else will.