You call upon your innate sense of justice and honor, whisper a short prayer, and redirect an attack so that you take the hit for those you would protect.

Daily   ✦     Divine
Immediate Interrupt      Personal

Trigger: An ally within 5 squares of you is attacked

Effect: The attack misses all of your allies it targets, but automatically hits you even if you weren't a target of the attack.

Published in Player's Handbook, page(s) 102.