Adam Clarke on Proverbs 30:3

I neither learned wisdom - I have never been a scholar in any of those schools of the wise men, nor have the knowledge of the holy, קדשים kedoshim, of the saints or holy persons.

The Septuagint give this a different turn: yeov dedidace me sofian, kai gnwsin agiwn egnwka; "God hath taught me wisdom, and the knowledge of the saints I have known."

This may refer to the patriarchs, prophets, or holy men, that lived before the days of Solomon. That is, the translators might have had these in view.