28. will serve the Lord by helping Aaron's descendants do their work at the temple, by keeping the courtyards and rooms of the temple clean, and by making sure that everything used in worship stays pure.
29. They will also be in charge of the sacred loaves of bread, the flour for the grain sacrifices, the thin wafers, any offerings to be baked, and the flour mixed with olive oil. These Levites will weigh and measure these offerings.
30. Every morning and evening, the Levites are to give thanks to the Lord and sing praises to him.
31. They must also give thanks and sing praises when sacrifices are offered on each Sabbath, as well as during New Moon Festivals and other religious feasts. There must always be enough Levites on duty at the temple to do everything that needs to be done.