You hurl yourself into your adversary, knocking him back into his allies and causing them all to stumble away from you.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Primary Target: One creature

Primary Attack: Strength vs. Reflex

Hit: 1[W] damage, and you push the target a number of squares up to your Intelligence modifier. Make the secondary attack.

  Secondary Target: Each enemy that was adjacent to the primary target before the push, is its size or smaller, and is within your melee reach

  Secondary Attack: Strength vs. Fortitude

  Hit: 2d6 + Strength modifier damage, and you can push the secondary target 1 square.

Published in Player's Handbook, page(s) 153, Class Compendium.