Where is "heaven" mentioned in the OT?

"Where is heaven mentioned in the OT?"
I've asked that question many times and have had a lot of silence in response.

In Genesis, Abraham is promised "the land." In Romans 4:13, Paul says that Abraham was given "the promise that he would be heir of the world."

I'd like to offer the premise: "The fulfillment is always greater than the promise."

Abraham was promised a piece of land in the OT. In the NT we see that it is really the whole world that was promised!

Hebrews 11:10 tells us that Abraham "was looking forward to the city with foundations, whose architect and builder is God." This sounds like the heavenly Jerusalem seen at the end of Revelation.

Review all the OT "kingdom" passages. ALL of them are eternal kingdoms. They do not last 1,000 years; they last forever. I would contend that they refer to heaven.

No one can read all those Kingdom passages in a wooden literal way, but that discussion is for another day