'God of Heaven' in the Bible

When I heard these words, I sat down and wept and mourned for days; and I was fasting and praying before the God of heaven.

I said, “I beseech You, O Lord God of heaven, the great and awesome God, who preserves the covenant and lovingkindness for those who love Him and keep His commandments,

Then the king said to me, “What would you request?” So I prayed to the God of heaven.

So I answered them and said to them, “The God of heaven will give us success; therefore we His servants will arise and build, but you have no portion, right or memorial in Jerusalem.”