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

And as was the way of the priests, he had to go into the Temple to see to the burning of perfumes.

κατα το εθος της ιερατειας επεσεν εις αυτον ο κληρος να θυμιαση εισελθων εις τον ναον του Κυριου·

According to the custom of the priest’s office, his lot was to burn incense when he went into the temple of the Lord.