Jiraiya: What I have to tell you is important and can't wait. From now on, you're my only student. We need to make a full fledged shinobi out of you in three years, and I'll do it.
Naruto: But why three years?
Jiraiya: We've received some disturbing information regarding the Akatsuki.
Jiraiya: We've reason to believe you've been chosen as their next target, and we have three or four years before they come after you.