Proverbs 2:7

7. Sound wisdom תושׁיה , ( tushiyyah.) The word is uncertain; it corresponds to sound doctrine. 1 Timothy 1:10; 2 Timothy 4:3. It may mean the essence, substance, or reality of things, as opposed to all merely seeming good. This sense harmonizes well with the other member of the hemistich; God treasures up all real good for the righteous, and protects them from all harm.

A buckler to… walk uprightly Literally, he is a shield, a defence, to the walkers of perfectness perfect walkers; persons of integrity, of soundness of morals and religion. It stands in parallelism with ישׁרים , ( yesharim,) the righteous, and applies to the same class. Conant renders, “He has help in store for the upright, a shield for those who walk in integrity.” Geneva Bible, first clause: “He preserveth the state of the righteous.”