Hiss of Sleep

(Spell Compendium, page 114, DnD 3.5)

Enchantment (Compulsion) [Mind-Affecting]

Level: ; Sorcerer/Wizard 7
Components: V
Casting Time: 1 round
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature/level
Duration: 1 round/level
Saving Throw: Will negates
Spell Resistance: No

From your hiding place, you whisper the spell softly, your words taking on a sonorous drone. One by one, your foes drop to ground, asleep.

The targets of this spell fall into a comatose slumber. Sleeping creatures are helpless. Slapping or wounding the subjects awakens them, but normal noise does not. Awakening a creature is a standard action.