Behold, thou shalt be dumb. — The question was answered, the demand for a sign granted, but the demand had implied a want of faith, and therefore the sign took the form of a penalty. The vision and the words of the angel, harmonising as they did with all Zechariah’s previous convictions, ought to have been enough for him.
Related Commentaries of Luke 1:20
Luke 1:20
20 And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season.