Bring the Cask of Scalder to Furen Longbeard.
You really showed what you were made of when you ran the Rethban Gauntlet, [player]. And I'm true to my word. I'll get you the reward I promised...
Except it's in Stormwind.
Talk to my friend, Furen Longbeard, in the Dwarven District of Stormwind. He's the best shieldsmith you'll ever meet, and he owes me a big favor.
Here, take Furen this cask of Barleybrew Scalder and ask him for a shield. He'll give you a nice one.