Albert Barnes Commentary Job 27:2

"As God liveth, who hath taken away my right, And the Almighty, who hath vexed my soul:" — Job 27:2 (ASV)

As God lives - This is a form of solemn adjuration, or an oath by the living God: “As certainly as God lives.” It is the form by which God Himself often swears (Ezekiel 33:11), and is often employed by others (for example, 1 Samuel 20:3; 1 Samuel 25:26).

Who has taken away my judgment - This refers to one who has rejected my cause, or who has refused me justice; that is, one who has treated me as though I were guilty and withholds relief from me.

The language is forensic. The idea is that Job would make his solemn appeal to God, even though God had rejected his cause.

Perhaps more is implied here than the solemnity of an ordinary oath. A man might be supposed to be willing to make his appeal to one who had shown himself friendly or favorable to him. However, he would be more reluctant to make his appeal in an important case to a judge who had decided against him, especially if that decision was regarded as severe and if that judge had refused to hear what he had to say in self-defense.

But Job here says that such was his confidence in his own sincerity and truth that he could make his appeal to God, even though he knew that God had until now gone against him and treated him as if he were guilty.

Who has vexed my soul - Margin, as in Hebrew “made my soul bitter.” This means one who has greatly afflicted me; compare 2 Kings 4:27 (margin) and Ruth 1:20.