For our protection is of the Lord, and of our king the holy one of Israel.

“"You spoke sometime in vision unto Your sons, and said" [Psalm 89:19]. You spoke in your vision. You revealed this to Your Prophets. For this reason You spoke in vision, that is, in revelation: whence Prophets were called seers. They saw something within, which they were to speak without: and secretly they heard what they preached openly. Then " You spoke in vision unto Your sons, and said, I have laid help upon One that is mighty." You understand Who is meant by mighty? "I have exalted One chosen out of the people." And Who is meant by chosen? One who, you rejoice, is already exalted.”

“I have found David my servant,.... Not David literally; but his Son and antitype, the Messiah, who is sometimes called by his name; See Gill on Psa 89:3, and his "finding" him does not suppose any ignorance of him, nor anxious solicitude in seeking him, nor any fortuitous event; but is attributed to God by an anthropopathy, or speaking after the manner of men; for it is an act of the highest wisdom, and richest grace, to find out, that is, to pick and appoint, in council and covenant, his own Son to be his servant, to be the Redeemer and Saviour of sinners, and to be a ransom for them, Job 33:24. The Apostle Paul seems to refer to this passage in Act 13:22. with my holy oil have I anointed him: not with material oil, as David, his type, Sa1 16:13 but with the Holy Ghost, which may well be called holy oil, in allusion to the holy anointing oil under the law; the oil of gladness with which Christ was anointed above his fellows, and without measure, at the time of his conception and birth, at his baptism and ascension to heaven, and even, in some sense, from all eternity; for so early is he said to be anointed, and to be possessed with all fulness of grace, being invested with and installed into his office as Mediator; and from this anointing he has the name of Messiah and Christ, both which signify anointed, Act 10:38.”

“Having thus again come to refer to the king of Israel, the poet now still further unfolds the promise given to the house of David. The present circumstances are a contradiction to it. The prayer to Jahve, for which the way is thus prepared, is for the removal of this contradiction. A long line, extending beyond the measure of the preceding lines, introduces the promises given to David. With אז the respective period of the past is distinctly defined. The intimate friend of Jahve (חסיד) is Nathan (Ch1 17:15) or David, according as we translate בחזון "in a vision" or "by means of a vision." But side by side with the לחסידך we also find the preferable reading לחסידיך, which is followed in the renderings of the lxx, Syriac, Vulgate, Targum, Aquila, Symmachus, and the Quarta, and is adopted by Rashi, Aben-Ezra, and others, and taken up by Heidenheim and Baer. The plural refers to Samuel and Nathan, for the statement brings together what was revealed to these two prophets concerning David. עזר is assistance as a gift, and that, as the designation of the person succoured by it (שׁוּה על as in Psa 21:6) with גּבּור shows, aid in battle. בּחוּר (from בּחר = בּגר in the Mishna: to ripen, to be manly or of marriageable age, distinct from בּחיר in Psa 89:4) is a young man, adolescens: while yet a young man David was raised out of his humble lowly condition (Psa 78:71) high above the people. When he received the promise (2 Sam. 7) he had been anointed and had attained to the lordship over all Israel. Hence the preterites in Psa 89:20-21, which are followed by promissory futures from Psa 89:22 onwards. תּכּון is fut. Niph., to be established, to prove one's self to be firm, unchangeable (Psa 78:37), a stronger expression than תּהיה, Sa1 18:12, Sa1 18:14; Sa2 3:10. The Hiph. השּׁיא, derived from נשׁא = נשׁה, to credit (vid., on Isa 24:2; Gesenius, Hengstenberg), does not give any suitable sense; it therefore signifies here as elsewhere, "to impose upon, surprise," with בּ, as in Psa 55:16 with על. Psa 89:23 is the echo of Sa2 7:10.”