Verses with the word middlemost in the Old Testament (2 verses):

Ezekiel 42:5
Now the upper chambers were shorter: for the galleries were higher than these, than the lower, and than the middlemost of the building.

Ezekiel 42:6
For they were in three stories, but had not pillars as the pillars of the courts: therefore the building was straitened more than the lowest and the middlemost from the ground.