According to the custom of the ·priests [L priesthood], he was chosen by lot [C similar to dice; used to determine God’s will] to go into the Temple of the Lord and burn incense [1 Chr. 6:49; Heb. 9:6].
The story begins in the days when Herod was king of Judea with a priest called Zacharias, whose wife Elisabeth was, like him, a descendant of Aaron. They were both truly religious people, blamelessly observing all God’s commandments and requirements. They were childless through Elisabeth’s infertility, and both of them were getting on in years. One day, while Zacharias was performing his priestly functions (it was the turn of his division to be on duty), it fell to him to go into the sanctuary and burn the incense. The crowded congregation outside was praying at the actual time of the incense-burning, when an angel of the Lord appeared on the right side of the incense-altar. When Zacharias saw him, he was terribly agitated and a sense of awe swept over him. But the angel spoke to him, “Do not be afraid, Zacharias; your prayers have been heard. Elisabeth your wife will bear you a son, and you are to call him John. This will be joy and delight to you and many more will be glad because he is born. He will be one of God’s great men; he will touch neither wine nor strong drink and he will be filled with the Holy Spirit from the moment of his birth. He will turn many of Israel’s children to the Lord their God. He will go out before God in the spirit and power of Elijah—to reconcile fathers and children, and bring back the disobedient to the wisdom of good men—and he will make a people fully ready for their Lord.”
It so happened that as Zachariah was carrying out his priestly duties before God, working the shift assigned to his regiment, it came his one turn in life to enter the sanctuary of God and burn incense. The congregation was gathered and praying outside the Temple at the hour of the incense offering. Unannounced, an angel of God appeared just to the right of the altar of incense. Zachariah was paralyzed in fear.
According to the minhag (custom) of the kehunah, Zecharyah was chosen by lot to enter the Beis Hamikdash and to offer ketoret (incense). [SHEMOT 30:7,8; DIVREY HAYAMIM ALEF 23:13; DIVREY HAYAMIM BAIS 29:11; TEHILLIM 141:2]