Matthew Poole and continuators on Job 31:5

5. If I have walked with vanity , or if my foot hath hasted to deceit ;

i. e. Conversed in the world, dealt with men,

i. e. with lying or falshood, or hypocrisie, as this word is oft used, as Psalm 4. 2. & 12. 3. & 36. 3. Prov. 30. 8. and as the next words explain it.

If when I have had any temptation or opportunity of enriching my self, by defrauding or wronging others, I have readily and greedily complied with it, as hypocrites (such as you account me) use to do, and have not rejected and abhorred it: for more is here understood then is expressed. The sense is imperfect, and supposeth an Imprecation, which is either understood, after the manner of the Hebrews, or expressed in the next Verse.