Whoso is partner with a thief hateth his own soul. The accomplice of a thief puts his own safety in danger. This is explained by what follows: He heareth cursing, and bewrayeth it not; better, he heareth the adjuration, and telleth not.
This refers to the course of proceeding defined by Le Proverbs 5:1, and intimated in 17:2. When a theft was committed, the person wronged or the judge pronounced an imprecation on the thief and on any one who was privy to the crime, and refrained from giving information; a witness who saw and knew of it, and was silent under this formal adjuration, has to bear his iniquity; he is not only an accomplice of a criminal, he is also a perjurer; one sin leads to another.
Some commentators explain the first hemistich as referring only to the crime of receiving or using stolen goods, by which a man commits a crime and exposes himself to punishment; but it is best taken, as above, in connection with the second clause, and as elucidated thereby.