Hebrews 9:6

Now these things having been thus prepared, the priests go in continually into the first tabernacle, accomplishing the services;

Numbers 28:3

And thou shalt say unto them, This is the offering made by fire which ye shall offer unto Jehovah: he-lambs a year old without blemish, two day by day, for a continual burnt-offering.

Exodus 27:21

In the tent of meeting, without the veil which is before the testimony, Aaron and his sons shall keep it in order from evening to morning before Jehovah: it shall be a statue for ever throughout their generations on the behalf of the children of Israel.

Exodus 30:7-8

And Aaron shall burn thereon incense of sweet spices: every morning, when he dresseth the lamps, he shall burn it.

2 Chronicles 26:16-19

But when he was strong, his heart was lifted up, so that he did corruptly, and he trespassed against Jehovah his God; for he went into the temple of Jehovah to burn incense upon the altar of incense.

Daniel 8:11

Yea, it magnified itself, even to the prince of the host; and it took away from him the continual burnt-offering , and the place of his sanctuary was cast down.

Luke 1:8-11

Now it came to pass, while he executed the priest's office before God in the order of his course,

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
In the tent of meeting, without the veil which is before the testimony, Aaron and his sons shall keep it in order from evening to morning before Jehovah: it shall be a statue for ever throughout their generations on the behalf of the children of Israel.
Exodus 30:7
And Aaron shall burn thereon incense of sweet spices: every morning, when he dresseth the lamps, he shall burn it.
Numbers 28:3
And thou shalt say unto them, This is the offering made by fire which ye shall offer unto Jehovah: he-lambs a year old without blemish, two day by day, for a continual burnt-offering.
2 Chronicles 26:16
But when he was strong, his heart was lifted up, so that he did corruptly, and he trespassed against Jehovah his God; for he went into the temple of Jehovah to burn incense upon the altar of incense.
Daniel 8:11
Yea, it magnified itself, even to the prince of the host; and it took away from him the continual burnt-offering , and the place of his sanctuary was cast down.
Luke 1:8
Now it came to pass, while he executed the priest's office before God in the order of his course,

American Standard Version Public Domain