SRD
Touch of Truthtelling
Creatures are unable to speak any deliberate or intentional lies.
Enchantment \ Compulsion \ Mind-Affecting
Casting time: 1 Standard Action
Range: Touch
Duration: 1 Minute/level
Targets: Creature Touched
Description
Components: V, S, DF
Saving Throw: Will negates
Spell Resistance: yes
Creatures can’t speak any deliberate and intentional lies. Each potentially affected creature is allowed a save to avoid the effects when the spell is cast or when the creature first enters the emanation area. Affected creatures are aware of this enchantment. Therefore, they may avoid answering questions to which they would normally respond with a lie, or they may be evasive as long as they remain within the boundaries of the truth.
The target momentarily takes on the semblance of a being of perfect order, like an archon or inevitable, so that all who can see the target know it is affected by the spell. This divine guise flickers over the target for only an instant and does not allow it to pass as a member of a different race.
Note: This spell is associated with a particular deity. The caster must worship the associated deity. The symbol of the associated deity appears above the heads of those affected by this spell, making those affected and unaffected by the spell immediately apparent.