The Lord had told Isaiah that He would be as a lion and as a bird to Judah. As a lion attacks its prey with focused purposefulness, He would decimate the Judahites, and the shouts of the Egyptian shepherds that the Judahites had hired to protect them would not scare Him off. As a bird that protects its young from other animals, the Lord would protect Judah from its predator, Assyria (cf. Exodus 12). [source][source][source]
"He who protects is He who is strong as a lion to accomplish His purposes." [1][source]