Babble

One humanoid creature within range must succeed on an Intelligence saving throw, or they're speech becomes garbled nonsense for the duration. A creature affected by this spell cannot cast spells requiring verbal components for the duration. A creature affected by this spell can make the saving throw again at the end of each of its turns.

When casting this spell with a spell slot of 2nd level or higher, you can target one additional creature for each spell slot above 1st level.