New Defender's Study Bible Notes
20:5 Egypt their glory. The Assyrians at this time had already taken the northern kingdom of Israel into captivity, and were threatening Judah and Jerusalem. The kings of Judah, therefore, would be tempted to look to Egypt and Ethiopia for help. But these countries were already tributary to Assyria and were soon destined to be devastated themselves by the Babylonians. See on Isaiah 19:4, and also note Isaiah 20:4.