'Heaven' in the Bible

Then David lifted up his eyes and saw the angel of the Lord standing between earth and heaven, with his drawn sword in his hand stretched out over Jerusalem. Then David and the elders, covered with sackcloth, fell on their faces.

Then David built an altar to the Lord there and offered burnt offerings and peace offerings. And he called to the Lord and He answered him with fire from heaven on the altar of burnt offering.

But David did not count those twenty years of age and under, because the Lord had said He would multiply Israel as the stars of heaven.