“According to the custom of the priest's office, his lot was to burn incense when he went into the temple of the Lord.”
King James Version (KJV)
Lu 1:9 His lot. In the service of the sanctuary nothing was left to accident or to human arrangement. The "lot" determined who was to perform each separate portion of the sacred service, and especially who was each morning and evening to burn incense before the Lord. To burn incense. Burned on the altar of incense in the Holy Place morning and evening. To burn the incense was an office held so honorable that no one was allowed to perform it twice, since it brought the offering priest nearer the divine presence in the Holy of Holies than any other priestly act, and carried with it the richest blessing from on high, which all ought to have a chance of thus obtaining.