Hebrews 9:3

After the second veil was the tabernacle which is called the Holy of Holies,

Exodus 26:31-33

"You shall make a veil of blue, and purple, and scarlet, and fine twined linen, with cherubim. The work of the skillful workman shall it be made.

Exodus 40:3

You shall put the ark of the testimony in it, and you shall screen the ark with the veil.

Exodus 40:21

He brought the ark into the tabernacle, and set up the veil of the screen, and screened the ark of the testimony, as Yahweh commanded Moses.

Exodus 36:35-38

He made the veil of blue, purple, scarlet, and fine twined linen: with cherubim. He made it the work of a skillful workman.

1 Kings 8:6

The priests brought in the ark of the covenant of Yahweh to its place, into the oracle of the house, to the most holy place, even under the wings of the cherubim.

2 Chronicles 3:14

He made the veil of blue, and purple, and crimson, and fine linen, and ornamented it with cherubim.

Isaiah 25:7

He will destroy in this mountain the surface of the covering that covers all peoples, and the veil that is spread over all nations.

Matthew 27:51

Behold, the veil of the temple was torn in two from the top to the bottom. The earth quaked and the rocks were split.

Hebrews 6:19

This hope we have as an anchor of the soul, a hope both sure and steadfast and entering into that which is within the veil;

Hebrews 9:8

The Holy Spirit is indicating this, that the way into the Holy Place wasn't yet revealed while the first tabernacle was still standing;

Hebrews 10:19-20

Having therefore, brothers, boldness to enter into the holy place by the blood of Jesus,

Treasury of Scripture Knowledge

Summary

And after the second veil, the tabernacle which is called the Holiest of all;

Bible References

The second

Hebrews 6:19
This hope we have as an anchor of the soul, a hope both sure and steadfast and entering into that which is within the veil;
Hebrews 10:20
by the way which he dedicated for us, a new and living way, through the veil, that is to say, his flesh;
Exodus 26:31
"You shall make a veil of blue, and purple, and scarlet, and fine twined linen, with cherubim. The work of the skillful workman shall it be made.
Exodus 36:35
He made the veil of blue, purple, scarlet, and fine twined linen: with cherubim. He made it the work of a skillful workman.
Exodus 40:3
You shall put the ark of the testimony in it, and you shall screen the ark with the veil.
2 Chronicles 3:14
He made the veil of blue, and purple, and crimson, and fine linen, and ornamented it with cherubim.
Isaiah 25:7
He will destroy in this mountain the surface of the covering that covers all peoples, and the veil that is spread over all nations.
Matthew 27:51
Behold, the veil of the temple was torn in two from the top to the bottom. The earth quaked and the rocks were split.

The holiest

Hebrews 9:8
The Holy Spirit is indicating this, that the way into the Holy Place wasn't yet revealed while the first tabernacle was still standing;
Hebrews 10:19
Having therefore, brothers, boldness to enter into the holy place by the blood of Jesus,
1 Kings 8:6
The priests brought in the ark of the covenant of Yahweh to its place, into the oracle of the house, to the most holy place, even under the wings of the cherubim.