6 x 7 = 42

42 months of the Beast (Revelation 11:2), 42 children killed by bears (2 Kings 2:24) and 42 thousand slaughtered Ephraimites (Judges 12:6) are a consequence of the violation of the prohibition of the Kil'ayim, the prohibition to mix God (7) and the human (6).

When designing a shelter for the President, I tried to make the number of steps on the stairs imperfect (in the biblical sense): 9, 11, 99, 143. This building is outside the description of Ezekiel, it is not in the Scriptures.

The number of steps between adjacent bedroom levels: 9. Accordingly, to reach the 11th level (President's bedroom), you need to climb 99 steps. Above this, there are two flights of stairs of 11 steps, below the lower hall there are two parallel flights of 11 steps, if all the main flights of stairs are summed up, then we get 143 steps on the main stairs.

3D models of external buildings can be downloaded here.