Level: Cleric 0
Components: V, S
Casting Time: 1 standard action
Range: Touch
Target: Creature touched
Duration: Instantaneous
Saving Throw: Will negates
Spell Resistance: Yes
When laying your hand upon a creature, you channel negative energy that deals 1 point of damage.
Since undead are powered by negative energy, this spell cures such a creature of a like amount of damage, rather than harming it.
Source: Player’s Handbook (version 3.5), page 244.