Sleep

This creature is sleeping. A sleeping creature is helpless and treated as having a Dexterity of 0 (–5 modifier). Melee attacks against a helpless target get a +4 bonus (equivalent to attacking a prone target). Ranged attacks get no special bonus against helpless targets. Rogues can sneak attack helpless targets. Sleeping creatures wake up after being wounded.

Sleep — Spells — Pathfinder: WotR Database