Gregory the Dialogist

The innocent shall be saved, but he shall be saved by the cleanness of his hands. Which same sentence now if it be delivered touching the recompense of the kingdom of heaven, is supported by truth, in that whereas it is written concerning God, Who rendereth to every man according to his deeds, that man in the Last Inquest the justice of the Judge Eternal saveth, whom here His pitifulness sets free from impure deeds. …

Morals on the Book of Job, Book XVI ↗

Thomas Aquinas

Still not only is interior humility of the affection and the intellect required for salvation, but exterior purity of works is also necessary, and so he then says, "The innocent will be saved." He shows by what merit he will be saved saying, "he will be saved through the cleanness of his hands," that is, the innocence of his works. Consider here Eliphaz not only promises Job temporal goods which can be common to good and evil (if he is converted) as he had already, (5:17-26) but also spiritual goods, which are proper to good men. …

Commentary on Job ↗