Dumbfound

When a creature speaks to you, you gain the charmed condition for the duration. While charmed, you become unable to speak and you cannot understand languages for the duration, including the triggering speech. This allows you to forget the last sentence you hear.

At Higher Levels. When you cast this spell using a spell slot 2nd level, the Duration is 1 hour. When you cast this spell using a 3rd level spell slot, the Duration is 8 hours. When you cast this spell using a 4th level spell slot, the Duration is 24 hours. For each level above 4th level, increase the duration by a day.