Job 9:3

“If he will contend with him, etc.] If God will contend with man, so Sephorno; enter into a controversy with him, litigate and dispute the point in law, whether he is just or not, man cannot answer to the allegations he will produce; or if man should contend with God, a potsherd strive with its maker, to what purpose would it be? he could never avail himself by such a procedure; the match is unequal, there is no striving or contending with God in a judicial, way: he cannot answer him one of a thousand; which some understand, that God will not answer men; he will not vouchsafe to give an answer to such that plead with him, or talk with him of his judgments in providence, or pretend to…”

“If he--God will contend with him--literally, "deign to enter into judgment." he cannot answer, &c.--He (man) would not dare, even if he had a thousand answers in readiness to one question of God's, to utter one of them, from awe of His Majesty.”

“If he will contend with him - That is, if God enters into a controversy with man. If he chooses to charge crime on him, and to hold him responsible for his deeds. The language here is taken from courts of justice, and means that if a trial were instituted, where God should submit charges, and the matter were left to adjudication, man could not answer the charges against him; compare the notes at Isaiah 41:1. He cannot answer him one of a thousand - For one of a thousand of the sins charged on him. The word “thousand” here is used to denote the largest number, or all. A man who could not answer for one charge brought against him out of a thousand, must be held to be guilty; and the expression…”

“One - One accusation among a thousand which God shall produce against him. Job 9:4”

“9:3 If someone wanted to take God to court: Job later expressed the wish to meet God in court (13:3, 15, 23; 23:4).”

“he will contend: Job 9:20, Job 9:32, Job 9:33, Job 10:2, Job 23:3-7, Job 31:35-37, Job 33:13, Job 34:14, Job 34:15, Job 40:2; Isa 57:15, Isa 57:16; Rom 9:20 he cannot: Psa 19:12, Psa 40:12; Jo1 1:8, Jo1 3:20 Job 9:4”