American Standard Version
Let him not trust in vanity, deceiving himself; For vanity shall be his recompense.

Berean Study Bible
Let him not deceive himself with trust in emptiness, for emptiness will be his reward.

Douay-Rheims Bible
He shall not believe, being vainly deceived by error, that he may be redeemed with any price.

English Revised Version
Let him not trust in vanity, deceiving himself: for vanity shall be his recompence.

King James Bible
Let not him that is deceived trust in vanity: for vanity shall be his recompence.

World English Bible
Let him not trust in emptiness, deceiving himself; for emptiness shall be his reward.

Young's Literal Translation
Let him not put credence in vanity, He hath been deceived, For vanity is his recompence.

Job 15:31 Additional Translations ...