George Haydock's Catholic Commentary
Psalms 17:24
Him, by his grace. (Worthington) --- Iniquity, and be careful not to relapse. Others explain it in the past time. I have not shed the blood of my enemy when I could have done it, 1 Kings xxiv. 6, 14. (Calmet) --- Fui immaculatus. (St. Jerome) (Haydock) It seems most probable that David composed this before his fall, as Aberbanel, one of the most learned of the Jews, asserts. If he be only a figure of Jesus Christ, we may easily conceive how the latter might speak thus of his innocence, and declare his abhorrence of all sin, though he was made a sin- offering, having undertaken to expiate the iniquities of mankind. (Berthier)