If I have made gold my hope, or have said to the fine gold, Thou art my confidence;

Jamieson-Fausset-Brown Bible Commentary

24, 25. Job asserts his freedom from trust in money (1Ti 6:17). Here he turns to his duty towards God, as before he had spoken of his duty towards himself and his neighbor. Covetousness is covert idolatry, as it transfers the heart from the Creator to the creature (Col 3:5). In Job 31:26, 27 he passes to overt idolatry.

Matthew Henry's Concise Commentary

31:24-32 Job protests, 1. That he never set his heart upon the wealth of this world. How few prosperous professors can appeal to the Lord, that they have not rejoiced because their gains were great! Through the determination to be rich, numbers ruin their souls, or pierce themselves with many sorrows. 2. He never was guilty of idolatry. The source of idolatry is in the heart, and it corrupts men, and provokes God to send judgments upon a nation. 3. He neither desired nor delighted in the hurt of the worst enemy he had. If others bear malice to us, that will not justify us in bearing malice to them. 4. He had never been unkind to strangers. Hospitality is a Christian duty, 1Pe 4:9.