Luke 1, 5-25 : In the days of Herod the Great, king of Judea, there was a priest of the Abia tribe named Zacharias. His wife was also a descendant of Aaron; her name was Elizabeth. Both were righteous before God: they followed all the commandments and precepts of the Lord blamelessly. They had no children, for Elisabeth was barren, and both were advanced in years. Now, while Zechariah, during the time allotted to the priests of his group, was ministering to God, he was chosen by lot, according to the custom of the priests, to go and offer incense in the sanctuary of the Lord. The whole multitude of people were praying outside at the time of the incense offering. The angel of the Lord appeared to him, standing to the right of the altar of incense. At the sight of the angel, Zacharias was overwhelmed with fear.
The angel said to him: "Fear not, Zechariah, for your supplication has been heard: your wife Elizabeth will bear you a son, and you shall call his name John. You will rejoice and be glad, and many will rejoice at his birth, for he will be great before the Lord. He will not drink wine or strong drink, and he will be filled with the Holy Spirit from his mother's womb; he will cause many sons of Israel to return to the Lord their God; he will go before, in the presence of the Lord, with the spirit and power of the prophet Elijah, to turn the hearts of the fathers to their children, to bring back the rebellious to the wisdom of the righteous, and to prepare for the Lord a people well disposed."
Then Zechariah said to the angel, "How am I to know that this will happen? For I am an old man, and my wife is advanced in years."
The angel replied: "I am Gabriel, and I stand in the presence of God. I have been sent to speak to you and bring you this good news. But behold, you will be silenced, and until the day it comes true, you will no longer be able to speak, because you have not believed my words; they will be fulfilled in their own time."
The people waited for Zechariah, wondering why he lingered in the sanctuary. When he came out, he could not speak to them, and they understood that, in the sanctuary, he had had a vision. He made signs to them and remained mute. When he had completed his time of liturgical service, he returned home. Some time later, his wife Elisabeth conceived a child. For five months, she kept the secret. She said to herself: "This is what the Lord has done for me, in these days when he has set his eyes to erase what was my shame before men."