Proverbs 2:7 (KJV 1900) — 7 He layeth up sound wisdom for the righteous: He is a buckler to them that walk uprightly.
Those who are righteous may be certain that God has sound wisdom (as opposed to human wisdom) reserved for them. Those who walk uprightly may be sure He will be a buckler to them.
The buckler was a type of shield, a piece of defensive armor. It was made of wood, covered with skin or leather, strengthened with plates of metal, and worn on the left arm. In the middle of the buckler was a protrusion that was useful in causing stones and darts to glance off. The buckler was often four feet long and covered the whole body (Webster’s Dictionary, facsimile edition; 1928 [Anaheim, CA: Foundation for American Christian Education, 1967], s.v. “buckler.”).