Isaiah 30:12

Wherefore. God responds to the attitude expressed in vs. 8-11. The people, that is, most of them, will not listen, but the words of Isaiah will testify against them in the day of judgment.

Oppression and perverseness. The Dead Sea scroll 1QIs reads “thou shalt rejoice,” for “perverseness.” These wicked men oppress the weak and then boast about what they have done. Justice and a willingness to listen to reason mark the true children of God. By their arrogant refusal to heed Isaiah’s words, these reprobate hearers had given proof of the justice of the sentence now pronounced upon them.