Adam Clarke's Commentary on the Bible - Isaiah 66:15
The Lord will come with fire "Jehovah shall come as a fire" - For באש baesh , in fire, the Septuagint had in their copy קאש kaesh , as a fire; ὡς πυρ . To render his anger with fury "To breathe forth his anger in a burning heat" - Instead of להשב lehashib , as pointed by the Masoretes, to render, I understand it as להשב lehashshib , to breathe, from נשב nashab . read more
John Gills Exposition of the Bible Commentary - Isaiah 66:24
And they shall go forth ,.... That is, those constant and spiritual worshippers shall go forth from the holy mountain Jerusalem, the church of God, whither they are brought as an offering to the Lord, and where they worship him; for this is not to be understood of going out of Jerusalem literally, as Aben Ezra and Kimchi; or of their going out of their graves after the resurrection, as others; but either out of the Christian assemblies, or out of the houses of the saints, and the beloved... read more