A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
psa 69:1Upon Shoshannim--(See on Psa 45:1, title). Mingling the language of prayer and complaint, the sufferer, whose condition is here set forth, pleads for God's help as one suffering in His cause, implores the divine retribution on his malicious enemies, and, viewing his deliverance as sure, promises praise by himself, and others, to whom God will extend like blessings. This Psalm is referred to seven times in the New Testament as prophetical of Christ and the gospel times. Although the character in which the Psalmist appears to some in Psa 69:5 is that of a sinner, yet his condition as a sufferer innocent of alleged crimes sustains the typical character of the composition, and it may be therefore regarded throughout, as the twenty-second, as typically expressive of the feelings of our Saviour in the flesh. (Psa. 69:1-36)
(Compare Psa 40:2).
come in unto my soul--literally, "come even to my soul," endanger my life by drowning (Jon 2:5).
psa 69:3(Compare Psa 6:6).
mine eyes fail--in watching (Psa 119:82).
psa 69:4hate me, &c.--(Compare Joh 15:25). On the number and power of his enemies (compare Psa 40:12).
then I restored . . . away--that is, he suffered wrongfully under the imputation of robbery.
psa 69:5This may be regarded as an appeal, vindicating his innocence, as if he had said, "If sinful, thou knowest," &c. Though David's condition as a sufferer may typify Christ's, without requiring that a parallel be found in character.
psa 69:6for my sake--literally, "in me," in my confusion and shame.
psa 69:7This plea contemplates his relation to God as a sufferer in His cause. Reproach, domestic estrangement (Mar 3:21; Joh 7:5), exhaustion in God's service (Joh 2:17), revilings and taunts of base men were the sufferings.
psa 69:10wept (and chastened) my soul--literally, "wept away my soul," a strongly figurative description of deep grief.
psa 69:12sit in the gate--public place (Pro 31:31).
psa 69:13With increasing reliance on God, he prays for help, describing his distress in the figures of Psa 69:1-2.
psa 69:16These earnest terms are often used, and the address to God, as indifferent or averse, is found in Psa 3:7; Psa 22:24; Psa 27:9, &c.
psa 69:19Calling God to witness his distress, he presents its aggravation produced by the want of sympathizing friends (compare Isa 63:5; Mar 14:50).
psa 69:21Instead of such, his enemies increase his pain by giving him most distasteful food and drink. The Psalmist may have thus described by figure what Christ found in reality (compare Joh 19:29-30).
psa 69:22With unimportant verbal changes, this language is used by Paul to describe the rejection of the Jews who refused to receive the Saviour (Rom 11:9-10). The purport of the figures used is that blessings shall become curses, the "table" of joy (as one of food) a "snare," their
welfare--literally, "peaceful condition," or security, a "trap." Darkened eyes and failing strength complete the picture of the ruin falling on them under the invoked retribution.
psa 69:23continually to shake--literally, "to swerve" or bend in weakness.
psa 69:24An utter desolation awaits them. They will not only be driven from their homes, but their homes--or, literally, "palaces," indicative of wealth--shall be desolate (compare Mat 23:38).
psa 69:26Though smitten of God (Isa 53:4), men were not less guilty in persecuting the sufferer (Act 2:23).
talk to the grief--in respect to, about it, implying derision and taunts.
wounded--or, literally, "mortally wounded."
psa 69:27iniquity--or, "punishment of iniquity" (Psa 40:12).
come . . . righteousness--partake of its benefits.
psa 69:28book of the living--or "life," with the next clause, a figurative mode of representing those saved, as having their names in a register (compare Exo 32:32; Isa 4:3).
psa 69:29poor and sorrowful--the afflicted pious, often denoted by such terms (compare Psa 10:17; Psa 12:5).
set me . . . high--out of danger.
psa 69:30Spiritual are better than mere material offerings (Psa 40:6; Psa 50:8); hence a promise of the former, and rather contemptuous terms are used of the latter.
psa 69:32Others shall rejoice. "Humble" and poor, as in Psa 69:29.
your heart, &c.--address to such (compare Psa 22:26).
psa 69:33prisoners--peculiarly liable to be despised.
psa 69:34The call on the universe for praise is well sustained by the prediction of the perpetual and extended blessings which shall come upon the covenant-people of God. Though, as usual, the imagery is taken from terms used of Palestine, the whole tenor of the context indicates that the spiritual privileges and blessings of the Church are meant.