Ezekiel 41:4-6

Amplified Bible, Classic Edition

⁴ And he measured the length [of the interior of the second room] in the temple proper, twenty cubits, and the breadth, twenty cubits; and he [came out and] said to me, This is the Most Holy Place (the Holy of Holies).

⁵ Then he measured the wall of the temple, six cubits thick [to accommodate side chambers]; and the breadth of every side chamber, four cubits, round about the temple proper on every side.

⁶ These side chambers were three stories high, one over another and thirty in each story; and they entered into the wall which belonged to the house for the side chambers round about, that they might have hold of the wall [of the house], but they did not have hold of the wall of the temple.