'Sky' in the Bible

"At that time, I will willingly respond," declares the Lord. "I will respond to the sky, and the sky will respond to the ground;

Therefore the land will mourn, and all its inhabitants will perish. The wild animals, the birds of the sky, and even the fish in the sea will perish.

I will throw my bird net over them while they are flying, I will bring them down like birds in the sky; I will discipline them when I hear them flocking together.