'Sky' in the Bible

“Come here,” the Philistine called to David, “and I’ll give your flesh to the birds of the sky and the wild beasts!”

Today, the Lord will hand you over to me. Today, I’ll strike you down, cut your head off, and give the corpses of the Philistine camp to the birds of the sky and the creatures of the earth. Then all the world will know that Israel has a God,