Luke 1:64
Immediately his mouth was opened and his tongue set free, and he began to speak, praising God — the immediate opening of the mouth and freeing of the tongue is the completion of the sign given nine months earlier. Zechariah was silenced when he asked for proof of the angelic promise; his speech is restored when he confirms in writing the name given by the angel. The first use of his restored voice is praise — not recrimination, not complaint, but praise of God.