The interpretation timeline
Psalm 108:24 Douay-Rheims

My knees are weakened through fasting: and my flesh is changed for oil.

A.D. 430 – 1863 4 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“"I became also a reproach unto them" [Psalm 109:24]: through the death of the Cross. "For Christ has redeemed us from the curse of the law, being made a curse for us." [Galatians 3:13] "They looked upon Me, and shaked their heads." Because they beheld His crucifixion, without beholding His resurrection: they saw when His knees were weakened, they saw not when His flesh was changed.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“I became also a reproach unto them,.... Or they reproached him; not only in life, traducing his conversation, blaspheming his miracles, calling him a Samaritan, saying he had a devil, and charging him with sedition; but at the time of his death they reviled him, and treated him in the most opprobrious manner. When they looked upon me, they shaked their heads; which was verified in the Jews as they passed by the cross of Christ, whither they came to stare upon him and scoff at him, Mat 27:39.”
Source
1849
A.D.
1774–1849
“For oil, propter oleum. The meaning is, my flesh is changed, being perfectly emaciated, and dried up, as having lost all its oil, or fatness. (Challoner) — Or, “on account of the privation of perfumes,” (Berthier) which the Jews looked upon as necessary. David and Jesus Christ were exposed to many inconveniences.”
1863
A.D.
1796–1863
“H. " My flesh is dried up for want of oil." P. " My flesh faileth of fatness." The asoal practice of anointing the body was omitted in time of deep affliction.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.