Luke 1:10

7 And they had no child, because that Elisabeth was barren, and they both were [now] well stricken in years.

8 Now it came to pass, while he executed the priest`s office before God in the order of his course,

9 according to the custom of the priest`s office, his lot was to enter into the temple of the Lord and burn incense.

10 And the whole multitude of the people were praying without at the hour of incense.

11 And there appeared unto him an angel of the Lord standing on the right side of altar of incense.

12 And Zacharias was troubled when he saw [him], and fear fell upon him.

13 But the angel said unto him, Fear not, Zacharias: because thy supplication is heard, and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.