You bind a foe with your oath, consigning it to your god's punishment.

Daily   ✦     Divine, Weapon
Standard Action      Melee weapon

Target: Your oath of enmity target

Attack: Wisdom vs. AC

Hit: 3[W] + Wisdom modifier damage.

Effect: The target gains vulnerable 5 to your attacks (save ends).

Published in Player's Handbook 2, page(s) 45.