Augustine of Hippo

"I have been young, and now am old; yet have I not seen the righteous forsaken, nor his seed begging bread" [Psalm 37:25]. If it is spoken but in the person of one single individual, how long is the whole life of one man? And what is there wonderful in the circumstance, that a single man, fixed in some one part of the earth, should not, throughout the whole space of his life, being so short as man's life is, have ever seen "the righteous forsaken, nor his seed begging bread," although he may have advanced from youth to age. …

Exposition on Psalm 37 ↗

Ambrose of Milan

And therefore the Prophet added: I was young, and I grew old: so the Latins have it; but some according to the Greeks have it: I was young, and indeed I grew old, and I have not seen the righteous forsaken, nor his seed seeking bread. Clearly, for those who want to understand, the meaning is evident, that during his lifetime David did not see the righteous forsaken. …

Commentaries on the Twelve Davidic Psalms ↗

Thomas Aquinas

Then when he says, "I was young," he shows by experience that the goods of the just are fruitful, but not those of the wicked. And he sets forth this long experience regarding two things. First, regarding the immunity of the good from evils. Second, regarding their progress in good, at "All day long." Regarding the first, he does two things. First, he shows their immunity from evil with respect to the just man himself. Second, with respect to his offspring, at "Nor his offspring." Regarding the first, he does two things. …

Exposition on the Psalms of David ↗