Ezekiel
Ezekiel 41:4ESV·traditional attribution

And he measured the length of the room, twenty cubits, and its breadth, twenty cubits, across the nave. And he said to me, “This is the Most Holy Place.”

Matthew Henry Presbyterian @wholebiblehenry

We are still attending a prophet that is under the guidance of an angel, and therefore attend with reverence, though we are often at a loss to know both what this is and what it is to us. Observe here, 1. After the prophet had observed the courts he was at length brought to the temple, Eze 41:1.

Commenting on Ezekiel 41:1-11

John Gill Reformed Baptist @doctorgill

So he measured the length thereof twenty cubits,.... That is, of the most holy place, from east to west; which was the measure of it in Solomon's temple, Kg1 6:20, and the breadth twenty cubits before the temple: that is answerable or according to the breadth of the temple or holy place; which was also twenty cubits in breadth: this stood at the west end...

Jamieson-Fausset-Brown Reformed @jfbcommentary

thereof--of the holy of holies. before the temple--that is, before, or in front of the most holy place (so "temple" is used in Kg1 6:3). The angel went in and measured it, while Ezekiel stood in front, in the only part of the temple accessible to him.