the righteous. a righteous one.
an excellent oil. oil for the head. This verse is said to be "extremely obscure" and "corrupt to. degree". The Figure of speech Metalepsis (App-6) makes all clear; "head", being first used for hair, and then for the whole person by Figure of speech Synecdoche (of the Part). Hebrew. "as oil on the hair,. will not refuse it". Note the alternation of lines in this verse.
yet. Same root as "withal" in Psalms 141:10.