Psalms 89:20 - Matthew Poole's English Annotations on the Holy Bible

I have found: this is spoken of God figuratively after the manner of men, to imply the great scarcity of such persons, and the difficulty of finding them out. With my holy oil; both. with material oil, 1 Samuel 16:13 2 Samuel 5:3, and with the gifts and graces of my Holy Spirit, which are oft signified by oil or unction, as Psalms 45:7, compared with Hebrews 1:9 Isaiah 61:3 1 John 2:20,27.