isaiah 30:18 And therefore will the LORD wait, that he may be gracious unto you, and therefore will he be exalted, that he may have mercy upon you: for the LORD is a God of judgment: blessed are all they that wait for him. - Free Bible Online

      18. therefore--on account of your wicked perverseness (Isa 30:1, 2, 9, 15, 16), Jehovah will delay to be gracious [HORSLEY]. Rather, wait or delay in punishing, to give you time for repentance (Isa 30:13, 14, 17) [MAURER]. Or, "Yet therefore" (namely, because of the distress spoken of in the previous verses; that distress will lead the Jews to repentance, and so Jehovah will pity them) [GESENIUS].
      be exalted--Men will have more elevated views of God's mercy; or else, "He will rise up to pity you" [G. V. SMITH]. Or (taking the previous clause as MAURER, "Therefore Jehovah will delay" in punishing you, "in order that He may be gracious to you," if ye repent), He will be far removed from you (so in Ps 10:5, far above out sight); that is, He will not immediately descend to punish, "in order that He may have mercy," &c.
      judgment--justice; faithfulness to His covenant.
      wait--compare Isa 30:15, wait, namely, for His times of having mercy.

JFB.