Isaiah 10:20

such as are escaped cf. ch. Isaiah 4:2.

shall no more again stay(themselves) upon him that smote them an allusion to the Assyrian alliance contracted by Ahaz (2 Kings 16:7 ff.), a policy, however, whose evil consequences were not fully realised till the reign of Hezekiah. From the false situation in which the nation was then placed no escape was possible except by the intervention of Jehovah. After that deliverance the survivors shall adopt the attitude, consistently advocated by Isaiah, of steadfast reliance on Jehovah alone; they shall stay(themselves) upon Jehovah, the Holy One of Israel, in truth(in faithfulness).