'God of Heaven' in the Bible

And it came to pass, when I heard these words, that I sat down and wept, and mourned certain days, and fasted, and prayed before the God of heaven,

And said, I beseech thee, O LORD God of heaven, the great and terrible God, that keepeth covenant and mercy for them that love him and observe his commandments:

Then the king said to me, For what dost thou make request? So I prayed to the God of heaven.

Then I answered them, and said to them, The God of heaven, he will prosper us; therefore we his servants will arise and build: but ye have no portion, nor right, nor memorial, in Jerusalem.