Ezekiel 41:4

And he measured its length, twenty cubits; and the breadth, twenty cubits, before the temple: and he said unto me, This is the most holy place.

1 Kings 6:20

And the oracle within was twenty cubits in length, and twenty cubits in breadth, and twenty cubits in the height thereof; and he overlaid it with pure gold; and he overlaid the cedar-wood altar --

Hebrews 9:3-8

but after the second veil a tabernacle which is called Holy of holies,

Exodus 26:33-34

And thou shalt bring the veil under the clasps, and bring in thither, inside the veil, the ark of the testimony; and the curtain shall make a division to you between the holy place and the holiest of all.

2 Chronicles 3:8

And he made the house of the most holy place, the length of which was according to the breadth of the house, twenty cubits, and its breadth twenty cubits; and he covered it with fine gold, amounting to six hundred talents.

1 Kings 6:5

And against the wall of the house he built floors round about, against the walls of the house, round about the temple and the oracle; and he made side-chambers round about.

1 Kings 6:16

And he built twenty cubits of the innermost part of the house, both floor and walls, with boards of cedar; and he built them for it within, to be the oracle, the most holy place.

Revelation 21:16

And the city lies four-square, and its length is as much as the breadth. And he measured the city with the reed twelve thousand stadia: the length and the breadth and height of it are equal.

Treasury of Scripture Knowledge

Summary

So he measured the length thereof, twenty cubits; and the breadth, twenty cubits, before the temple: and he said unto me, This is the most holy place.

Bible References

Twenty cubits

1 Kings 6:20
And the oracle within was twenty cubits in length, and twenty cubits in breadth, and twenty cubits in the height thereof; and he overlaid it with pure gold; and he overlaid the cedar-wood altar --
2 Chronicles 3:8
And he made the house of the most holy place, the length of which was according to the breadth of the house, twenty cubits, and its breadth twenty cubits; and he covered it with fine gold, amounting to six hundred talents.
Revelation 21:16
And the city lies four-square, and its length is as much as the breadth. And he measured the city with the reed twelve thousand stadia: the length and the breadth and height of it are equal.

This

Exodus 26:33
And thou shalt bring the veil under the clasps, and bring in thither, inside the veil, the ark of the testimony; and the curtain shall make a division to you between the holy place and the holiest of all.
Hebrews 9:3
but after the second veil a tabernacle which is called Holy of holies,