Isaiah 30:5

5 the people of Judah will regret that they ever trusted that unreliable nation, a nation that fails them when they expect help."

Isaiah 30:5 Meaning and Commentary

Isaiah 30:5

They were all ashamed of a people [that] could not profit
them
The princes, the ambassadors that were sent unto them, and the king or people, or both, that sent them, who hoped for and expected great things from them, but, being disappointed, were filled with shame; because either the Egyptians, who are the people here meant, either could not help them, or would not, not daring to engage with so powerful an enemy as the Assyrian monarch, which is illustrated and confirmed by repeating the same, and using other words: nor be an help, nor profit, but a shame, and also a reproach:
so far from being of any advantage to them, by helping and assisting them against their enemy, wanting either inclination or capacity, or both, that it not only turned to their shame, but even was matter of reproach to them, that ever they made any application to them, or placed any confidence in them for help.

Isaiah 30:5 In-Context

3 But the king will be powerless to help them, and Egypt's protection will end in disaster.

4 Although their ambassadors have already arrived at the Egyptian cities of Zoan and Hanes,

5 the people of Judah will regret that they ever trusted that unreliable nation, a nation that fails them when they expect help."

6 This is God's message about the animals of the southern desert: "The ambassadors travel through dangerous country, where lions live and where there are poisonous snakes and flying dragons. They load their donkeys and camels with expensive gifts for a nation that cannot give them any help.

7 The help that Egypt gives is useless. So I have nicknamed Egypt, "The Harmless Dragon.' "