'Middle' in the Bible

In the visions of my mind as I was lying in bed, I saw this:There was a tree in the middle of the earth,and its height was great.

I heard a human voice calling from the middle of the Ulai: “Gabriel, explain the vision to this man.”

He will make a firm covenantwith many for one week,but in the middle of the weekhe will put a stop to sacrifice and offering.And the abomination of desolationwill be on a wing of the templeuntil the decreed destructionis poured out on the desolator.”