'Heavens' in the Bible

"Thus says Cyrus king of Persia: Yahweh, the God of the heavens, has given me all the kingdoms of the earth. And he himself has appointed me to build a house for him in Jerusalem, which is in Judah.

"Artaxerxes, the king of kings, to Ezra the priest, the scribe of the law of the God of the heavens. Peace. And now

and said, "My God, I am ashamed and embarrassed to lift my face to you, my God. For our sins have risen above our heads and our guilt has grown up to the heavens.