Ezekiel 41:4

And by his measure it was twenty cubits long and twenty cubits wide in front of the Temple: and he said to me, This is the most holy place.

1 Kings 6:20

And the inmost room was twenty cubits square and twenty cubits high, plated over with clear gold, and he made an altar of cedar-wood, plating it with gold.

Hebrews 9:3-8

And inside the second veil was the place which is named the Holy of holies;

Exodus 26:33-34

And you are to put up the veil under the hooks, and put inside it the ark of the law: the veil is to be a division between the holy place and the most holy.

2 Chronicles 3:8

And he made the most holy place; it was twenty cubits long, and twenty cubits wide, like the greater house, and was plated all over with the best gold; six hundred talents were used for it.

1 Kings 6:5

And against the walls all round, and against the walls of the Temple and of the inmost room, he put up wings, with side rooms all round:

1 Kings 6:16

And at the back of the house a further space of twenty cubits was shut in with boards of cedar-wood, for the inmost room.

Revelation 21:16

And the town is square, as wide as it is long; and he took the measure of the town with the rod, one thousand and five hundred miles: it is equally long and wide and high.

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 inmost room was twenty cubits square and twenty cubits high, plated over with clear gold, and he made an altar of cedar-wood, plating it with gold.
2 Chronicles 3:8
And he made the most holy place; it was twenty cubits long, and twenty cubits wide, like the greater house, and was plated all over with the best gold; six hundred talents were used for it.
Revelation 21:16
And the town is square, as wide as it is long; and he took the measure of the town with the rod, one thousand and five hundred miles: it is equally long and wide and high.

This

Exodus 26:33
And you are to put up the veil under the hooks, and put inside it the ark of the law: the veil is to be a division between the holy place and the most holy.
Hebrews 9:3
And inside the second veil was the place which is named the Holy of holies;

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