Augustine of Hippo

"He lies in ambush with the rich" [Psalm 10:8]. What rich, but those whom he will load with this world's gifts? And he is therefore said to lie in ambush with them, because he will display their false happiness to deceive men; who, when with a perverted will they desire to be such as they, and seek not the good things eternal, will fall into his snares. "That in the dark he may kill the innocent." "In the dark," I suppose, is said, where it is not easily understood what should be sought, or what avoided. …

Exposition on Psalm 10 ↗

Jerome

And lastly, against the devil: 'God is not before his eyes, he sits in ambush with the rich.' Unhappy the rich, with whom the devil sits. Finally, see what is said of the devil: 'He sits in ambush with the rich.' For whoever is rich, unless he has stripped the poor man, cannot be rich: for this reason he said, 'He sits in ambush with the rich.' Whenever the rich persecute Christians, let us say: 'The devil sits in ambush with the rich.' He lies in wait to seize the poor man, to seize the poor man while he draws him in: 'in his snare …

Homily 4, on Psalm 9 ↗

Thomas Aquinas

Here he shows the progress of the wicked as regards the body; and regarding this he does two things. First, he sets forth their progress. Second, the end of the progress, "in the snare." Regarding the first, he does three things. First, he sets forth with whom he lies in ambush, at "with the rich." Second, against whom: "to kill the innocent." Third, how he lies in ambush, "he lies in ambush in secret." He says therefore: The wicked, not content with speech, labor to accomplish their deeds; hence "he sits in ambush," thinking how to …

Exposition on the Psalms of David ↗