Your weapon attack is followed up by a blast of psionic power that knocks creatures to the ground.

Daily   ✦     Force, Psionic, Weapon
Standard Action      Melee weapon

Primary Target: One creature

Primary Attack: Constitution vs. AC

Hit: 2[W] + Constitution modifier damage.

Miss: Half damage.

Effect: Make a secondary attack that is a close blast 5, and that must include the primary target as a target.

  Secondary Target: Each creature in the blast

  Secondary Attack: Constitution vs. Fortitude

  Hit: 10 + Constitution modifier force damage, and you push the secondary target 2 squares and knock it prone.

Published in Psionic Power, page(s) 43.