Hebrews 9:6

Now while these things were in existence, the priests went into the first Tent at all times, for prayer and the making of offerings.

Numbers 28:3

Say to them, This is the offering made by fire which you are to give to the Lord; he-lambs of the first year without any mark, two every day as a regular burned offering.

Exodus 27:21

Let Aaron and his sons put this in order, evening and morning, before the Lord, inside the Tent of meeting, outside the veil which is before the ark; this is to be an order for ever, from generation to generation, to be kept by the children of Israel.

Exodus 30:7-8

And on this altar sweet spices are to be burned by Aaron every morning when he sees to the lights.

2 Chronicles 26:16-19

But when he had become strong, his heart was lifted up in pride, causing his destruction; and he did evil against the Lord his God; for he went into the Temple of the Lord for the purpose of burning perfumes on the altar of perfumes.

Daniel 8:11

It made itself great, even as great as the lord of the army; and by it the regular burned offering was taken away, and the place overturned and the holy place made waste.

Luke 1:8-11

Now it came about that in his turn he was acting as priest before God,

Treasury of Scripture Knowledge

Summary

Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God.

Bible References

The priests

Exodus 27:21
Let Aaron and his sons put this in order, evening and morning, before the Lord, inside the Tent of meeting, outside the veil which is before the ark; this is to be an order for ever, from generation to generation, to be kept by the children of Israel.
Exodus 30:7
And on this altar sweet spices are to be burned by Aaron every morning when he sees to the lights.
Numbers 28:3
Say to them, This is the offering made by fire which you are to give to the Lord; he-lambs of the first year without any mark, two every day as a regular burned offering.
2 Chronicles 26:16
But when he had become strong, his heart was lifted up in pride, causing his destruction; and he did evil against the Lord his God; for he went into the Temple of the Lord for the purpose of burning perfumes on the altar of perfumes.
Daniel 8:11
It made itself great, even as great as the lord of the army; and by it the regular burned offering was taken away, and the place overturned and the holy place made waste.
Luke 1:8
Now it came about that in his turn he was acting as priest before God,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain