I have found David my servant; with my holy oil have I anointed him:
Ver. 20. I have found David] The Father seeketh such as worship him in spirit and in truth, John 4:23. The whole Trinity agreed upon Christ for a mediator.
With my holy oil have I anointed him] How Christ was appointed and anointed to the mediatorship. See Trapp on " Psa 45:7 "