Luke 1:8-11
1:8 Now while Zechariah was serving as priest before God when his division was on duty,
1:9 he was chosen by lot, according to the custom of the priesthood, to enter the holy place of the Lord and burn incense.
1:10 Now the whole crowd of people were praying outside at the hour of the incense offering.
1:11 An angel of the Lord, standing on the right side of the altar of incense, appeared to him.