Matthew Poole and continuators on 1 Kings 6:2

2 And the house which king Solomon built for the LORD, the length thereof was threescore cubits , and the breadth thereof twenty cubits, and the height thereof thirty cubits.

Properly so called, as distinct from all the Walls and Buildings which were adjoyning to it; to wit, the Holy, and Most Holy Place.

From East, and to West. And this, and the other Measures may seem to belong to the inside from Wall to Wall.

Cubits of the Sanctuary; of which, See on Gen. 6. 15.

To wit, of the House: for the Porch was 120 Cubits high, 2 Chron. 3. 4. So that all the measures compared each with other, were harmonious. For 60 to 20. (the length to the breadth) is triple: or as 3 to 1: And 60 to 30 (the length to the height) is double, or as 2 to 1: And 30 to 20 (the heighth to the breadth) is Sesquialter, or one and a half, as 3 to 2. Which are the Proportions answering to the Three great Concords in Musick, commonly called, a Twelfth, an Eighth, and a Fifth. Which therefore must needs be a graceful Proportion to the Eye, as that in Musick is graceful to the Ear.