Censor

You unleash a ferocious proclamation for silence declaring a taboo to a creature you can see within range. If the target can hear you (though it need not understand your speech, only your tone), it must make a Charisma saving throw or be mentally censored until the start of your next turn. If the target speaks, or intentionally performs an action to communicate verbally or nonverbally to another creature, the target takes 1d8 psychic damage, and the spell ends.

At Higher Levels. At 5th level, the spell deals 1d8 psychic damage to the target on a failed save, and the damage for breaking the censor to 2d8. Both damage rolls increase by 1d8 at 11th level (2d8 and 3d8) and again at 17th level (3d8 and 4d8).