John Gill Commentary Ezekiel 14:20

"though Noah, Daniel, and Job, were in it, as I live, saith the Lord Jehovah, they should deliver neither son nor daughter; they should but deliver their own souls by their righteousness." — Ezekiel 14:20 (ASV)

Though Noah, Daniel, and Job, [were] in it Who are again mentioned by name, as in (Ezekiel 14:14); and are the three men referred to in (Ezekiel 14:16Ezekiel 14:18); [as] I live, says the Lord God, they shall deliver neither son nor daughter; not so much as an only son, or an only daughter, no, not even a single child: the plural number is used before, as in (Ezekiel 14:16Ezekiel 14:18); here the singular, to show how resolutely determined the Lord was upon the destruction of the land; that even the prayers of the best of men among them should not prevail with him to save a single person, no, not a single infant.

They shall [but] deliver their own souls by their righteousness; (See Gill on Ezekiel 14:14).