Zechariah asked for a tablet and wrote, “John is his name,” and all were amazed. Immediately his mouth was opened, his tongue freed, and he spoke blessing God. (Lk 1:57-66)
https://bible.usccb.org/bible/readings/122322.cfm
With the Birth of John the Baptist, Zechariah’s tongue is loosed and he praises God in the canticle known as the Benedictus, which is sung every day at Morning Prayer. And now all is ready, and we we wait. We wait for the Lord. We wait with Mary for the birth of Emmanuel.