'God of Heaven' in the Bible

It happened, when I heard these words, that I sat down and wept, and mourned certain days; and I fasted and prayed before the God of heaven,

and said, "I beg you, Yahweh, the God of heaven, the great and awesome God, who keeps covenant and loving kindness with those who love him and keep his commandments:

Then the king said to me, "For what do you make request?" So I prayed to the God of heaven.

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