Moment of Peace is a 19th level cleric Daily prayer that was introduced in Divine Power.
Moment of Peace
Cleric Attack 19
A wave of tranquility washes over your foes, rendering them harmless for a critical moment.
Close blast 5
Target: Each enemy in blast
Attack: Wisdom vs. Will
Hit: The target's attacks deal no damage (save ends).
Miss: The target's attacks deal no damage until the end of your next turn.