'Sky' in the Bible

The Philistine also said to David, “Come to me, and I will give your flesh to the birds of the sky and the beasts of the field.”

This day the Lord will deliver you up into my hands, and I will strike you down and remove your head from you. And I will give the dead bodies of the army of the Philistines this day to the birds of the sky and the wild beasts of the earth, that all the earth may know that there is a God in Israel,