Isaiah 30:5

In vain shall they labor [in seeking] to a people, which shall not profit them for help, but [shall be] for a shame and reproach.

They were all ashamed of a people that could not profit them, nor be an help nor profit, but a shame, and also a reproach.

They shall all be ashamed because of a people that can’t profit them, that are not a help nor profit, but a shame, and also a reproach.”