Zone of Truth

You create a magical zone that guards against deception in a 15-foot-radius sphere centered on a point of your choice within range. Until the spell ends, a creature that enters the spell's area for the first time on a turn or starts its turn there must make a Charisma saving throw. On a failed save, a creature can't speak a deliberate lie while in the radius. You know whether each creature succeeds or fails on its saving throw.

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An affected creature is aware of the spell and can thus avoid answering questions to which it would normally respond with a lie. Such a creature can remain evasive in its answers as long as it remains within the boundaries of the truth.