Tome of Divinity

Hello, [your name]. I know you're busy helping out the people of Azeroth, but when you have the time, you should return to Ironforge and speak to one of the most respected paladins of your home: Tiza Battleforge. She's the one the younger dwarven paladins go to when it is time they learn more about the Light and what's expected of all of us.

You can find her upstairs in the Hall of Mysteries which is located in the Mystic Ward.