Ezekiel 41:4

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

1 Kings 6:20

And the oracle in the forepart was twenty cubits in length, and twenty cubits in breadth, and twenty cubits in the hight of it, and he overlaid it with pure gold; and so covered the altar which was of cedar.

Hebrews 9:3-8

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

Exodus 26:33-34

And thou shalt hang the vail under the buttons, that thou mayst bring in thither within the vail the ark of the testimony: and the vail shall divide to you between the holy place and the most holy.

2 Chronicles 3:8

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

1 Kings 6:5

And against the wall of the house he built chambers round about, against the walls of the house round about, both of the temple and of the oracle: and he made chambers round about:

1 Kings 6:16

And he built twenty cubits on the sides of the house, both the floor and the walls with boards of cedar: he even built them for it within, even for the oracle, even for the most holy place.

Revelation 21:16

And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the hight 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 in the forepart was twenty cubits in length, and twenty cubits in breadth, and twenty cubits in the hight of it, and he overlaid it with pure gold; and so covered the altar which was of cedar.
2 Chronicles 3:8
And he made the most holy house, the length of which was according to the breadth of the house, twenty cubits, and the breadth of it twenty cubits: and he overlaid it with fine gold, amounting to six hundred talents.
Revelation 21:16
And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the hight of it are equal.

This

Exodus 26:33
And thou shalt hang the vail under the buttons, that thou mayst bring in thither within the vail the ark of the testimony: and the vail shall divide to you between the holy place and the most holy.
Hebrews 9:3
And after the second vail, the tabernacle which is called the Holiest of all;