Judge me, O God - This does not mean, Pronounce sentence upon me; but, Undertake my cause; interpose in my behalf; do justice in the case. He regarded his own cause as right; he felt that he was greatly wronged by the treatment which he received from people, and he asks to have it shown that he was not guilty of what his enemies charged on him; that he was an upright man, and a friend of God. See Psalms 7:8, note; Psalms 26:1, note.
And plead my cause - See the notes at Psalms 35:1. “Against an ungodly nation.” Margin, unmerciful. Literally, “from a nation not merciful,” or not; religious. The idea is, that the nation or people referred to manifested none of the spirit of religion in their conduct toward him; that he was treated with severity and injustice. This entire description would agree well with the state of things in the time of the rebellion of Absalom, when David was driven from his home and his throne: 2 Samuel 15, following.
O deliver me from the deceitful and unjust man - Margin, as in Hebrew, from a man of deceit and iniquity. This would apply well to the case and character of Absalom, or perhaps more directly and properly to the character and counsel of Ahithophel, among the leading conspirators in the rebellion of Absalom, to whose counsels much of the rebellion was owing: 2 Samuel 15:31; compare 2 Samuel 16:23; 2Sa 17:14, 2 Samuel 17:23.