John Trapp on Psalms 133:2

Verſ. 2 It is like the precious ointment] This ſimilitude ſetteth forth the pleaſure and amaenity of it; as the other (from the dew) the profit and commodity. — Sic miſcuit utile dulci. This ointment was moſt rich (as made up of the chiefeſt ſpices, Exod, 30.) and very fragrant, refreſhing the ſenſes, not of Aaron only, but of all about him; [illegible: 1 letter]al. 5. ſo doth Chriſtian unity and amity (that fruit of the Spirit) far beyond that common friendſhip ſo highly extolled by Cicero, and other Heathens; and is therefore here fitly compared to that Non-ſuch odoriferous ointment.

Upon the head, that ran down upon the beard] So the Spirit of grace, that oil of gladneſſe, Pſal. 45.7.) poured out abundantly, even to a redundancy, upon Chriſt the head, runneth down upon all the members of his body myſticall, even to the meaneſt, ſo that they have grace for grace.