Gregory the Dialogist

They shall be cut off from morning to evening. For the sinner is 'cut off from morning to evening,' in that from the beginning of his life to the end thereof he is ever getting wounded by the commission of sin. For the reprobate by increase in wickedness are at all times redoubling blows upon themselves, cut off by which, they may fall headlong into the pit. And it is well said of them by the Psalmist, Bloody and deceitful men shall not halve their days. …

Morals on the Book of Job, Book V ↗

Thomas Aquinas

This can also refer to violent death for he says next, "Between morning and evening they will be destroyed," for trees are cut down by a cause outside the tree itself. He says distinctly enough, "between morning and evening," because natural death can certainly be foreseen before it happens by certain natural symptoms, but violent death is completely uncertain as though it were subject to different causes. For this reason, a man cannot know if he will live from morning until evening. …

Commentary on Job ↗