Divine Ward, Protection cleric domain ability says
Reaction - trigger: an ally in range takes damage
Redirect damage no more than twice your level to you. You take the damage instead of your triggering ally.
OK, so if I am level 1 and my ally takes 3 damage, knocking him over, can I redirect 2 of that damage to me and he only takes 1, or do I stand there helpless because the whole hit is more than twice my level?