Jamieson, Fausset and Brown on Ezekiel 14:12

12. The second part of the chapter: the effect which the presence of a few righteous persons was to have on the purposes of God (compare Ge 18:24-32). God had told Jeremiah that the guilt of Judah was too great to be pardoned even for the intercession of Moses and Samuel (Psa 99:6; Jr 14:2; 15:1), which had prevailed formerly (Ex 32:11-14; Nu 14:13-20; 1Sa 7:8-12), implying the extraordinary heinousness of their guilt, since in ordinary cases "the effectual fervent prayer of a righteous man (for others) availeth much" (Jas 5:16). Ezekiel supplements Jeremiah by adding that not only those two once successful intercessors, but not even the three pre-eminently righteous men, Noah, Daniel, and Job, could stay God's judgments by their righteousness.