אָ֗ז תָּ֭בִין יִרְאַ֣ת יְהוָ֑ה וְדַ֖עַת אֱלֹהִ֣ים תִּמְצָֽא׃
Then shalt thou understand the fear of the LORD, And find the knowledge of God.
Rashi on Proverbs
then you will understand the fear of the Lord This refers back to the topic above, in which he said, “For if you call for understanding.”