When a wizard casts a sleep spell, he causes a comatose slumber to come upon one or more creatures for at least a few minutes. All creatures to be affected by the sleep spell must be within 30 feet of each other. Slapping or wounding awakens affected creatures but normal noise does not.
Note: This version of sleep originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.