'God of Heaven' in the Bible

He asked them to pray for mercy from the God of heaven concerning this mystery so that he and his friends would not be destroyed along with the rest of the wise men of Babylon.

Then in a night vision the mystery was revealed to Daniel. So Daniel praised the God of heaven,

"You, O king, are the king of kings. The God of heaven has granted you sovereignty, power, strength, and honor.

In the days of those kings the God of heaven will raise up an everlasting kingdom that will not be destroyed and a kingdom that will not be left to another people. It will break in pieces and bring about the demise of all these kingdoms. But it will stand forever.