'Heaven' in the Bible

When David looked up and saw the angel of the Lord standing between earth and heaven, with his drawn sword in his hand stretched out over Jerusalem, David and the elders, clothed in sackcloth, fell down with their faces to the ground.

He built an altar to the Lord there and offered burnt offerings and fellowship offerings. He called on the Lord, and He answered him with fire from heaven on the altar of burnt offering.

David didn’t count the men aged 20 or under, for the Lord had said He would make Israel as numerous as the stars of heaven.