Psalms 109:23-31

23 As a shadow when it is stretched out I have gone, I have been driven away as a locust.
24 My knees have been feeble from fasting, And my flesh hath failed of fatness.
25 And I -- I have been a reproach to them, They see me, they shake their head.
26 Help me, O Jehovah my God, Save me, according to Thy kindness.
27 And they know that this [is] Thy hand, Thou, O Jehovah, Thou hast done it.
28 They revile, and Thou dost bless, They have risen, and are ashamed, And Thy servant doth rejoice.
29 Mine accusers put on blushing, and are covered, As an upper robe [is] their shame.
30 I thank Jehovah greatly with my mouth, And in the midst of many I praise Him,
31 For He standeth at the right hand of the needy, To save from those judging his soul.

Psalms 109:23-31 Meaning and Commentary

To the chief Musician, A Psalm of David. This psalm was written by David, under the inspiration of the Holy Spirit, concerning Judas the betrayer of Christ, as is certain from Acts 1:16 hence it is used to be called by the ancients the Iscariotic psalm. Whether the occasion of it was the rebellion of Absalom, as some, or the persecution of Saul, as Kimchi; and whoever David might have in view particularly, whether Ahithophel, or Doeg the Edomite, as is most likely; yet it is evident that the Holy Ghost foresaw the sin of Judas, and prophesies of that, and of the ruin and misery that should come upon him; for the imprecations in this psalm are no other than predictions of future events, and so are not to be drawn into an example by men; nor do they breathe out anything contrary to the spirit of Christianity, but are proofs of it, since what is here predicted has been exactly accomplished. The title in the Syriac version is, "a psalm of David when they created Absalom king without his knowledge, and for this cause he was slain; but to us it expounds the sufferings of the Christ of God;" and indeed he is the person that is all along speaking in this psalm.
Young's Literal Translation is in the public domain.