Job 31:5

b. Job’s first protestation is, that he has not practiced deceit, nor acted on dishonest principles, nor departed from the way of chastity, ( as indicated in Job 31:1,) a specification which prepares the way for the next protestation, Job 31:5-8.

5. If The usual form of oaths. See note on Job 27:2; Job 27:4-5. He means to attest his innocence under the most solemn sanctions.

Vanity The prime meaning of the Hebrew is, falsity. A sad companionship is that of a false, hollow, hypocritical nature; such every corrupt man must “walk with.”