Belt of Faith

Belt Of Faith is cloth belt priests and part of the tier 3 armor set. It is available through quest items in Naxxramas.

Source
Belt of Faith is a quest reward from the quest which starts with Father Inigo Montoy in Light's Hope Chapel in Eastern Plaguelands. To complete the quest, you must turn the following items to Inigo Montoy:
 * 1 Desecrated Belt
 * 8 Wartorn Cloth Scrap
 * 2 Arcane Crystal
 * 2 Mooncloth