auditory illusion visual 

Traditions arcane, occult

Cast [>>] somatic, verbal

Range touch; Targets 1 creature or object

Duration unlimited

You specify a trigger (described on page 305) and a message up to 25 words long. When the specified trigger occurs within 30 feet of the target, an illusory mouth appears on the target and speaks the message, and the magic mouth spell ends.

Core Rulebook, page 349.