He layeth up sound wisdom for the righteous: he is a buckler to them that walk uprightly. He layeth up sound wisdom - תושיה tushiyah. We have met with this word in Job; see Job 5:12; Job 6:13; Job 11:6; Job 12:16. See especially the note on Job 11:6 (note), where the different acceptations of the word are given.
Coverdale translates, "He preserveth the welfare of the righteous." It is difficult to find, in any language, a term proper to express the original meaning of the word; its seems to mean generally the essence or substance of a thing, The thing itself - that which is chief of its kind. He layeth up What Is Essential for the righteous.