Clement of Alexandria

We must regard the woman's crown to be her husband, and the husband's crown to be marriage; and the flowers of marriage the children of both, which the divine husbandman plucks from meadows of flesh. "Children's children are the crown of old men." And the glory of children is their fathers, it is said; and our glory is the Father of all; and the crown of the whole church is Christ.

The Instructor Book 2 ↗

Bede

The crown of old men is the children of children, etc. He calls the patriarchs and prophets old men, who are celebrated with worthy praise by the children of children, that is, by the successors of the apostles; and it is a glory of the preachers of the New Testament that they have deserved to be sons of the old fathers.

Commentary on Proverbs ↗

John Cassian

And instead of that joy, which a man experiences from the possession of a single field or house, he will enjoy a delight in riches a hundred times greater, if he passes over to the adoption of sons of God, and possesses as his own all things which belong to the eternal Father, and asserts in heart and soul after the fashion of that true Son: "All things that the Father hath are mine;" and if no longer tried by that criminal anxiety in distractions and cares, but free from care and glad at heart he succeeds everywhere to his own, …

Conference 24:26 ↗