Matthew Poole and continuators on Job 15:4

4. Yea, thou castest off fear , and restrainest prayer before God.

Heb. Thou makest void fear; i. e. the fear of God, as the word is oft used for the word of God; or Piety and Religion, which oft cometh under the name of fear. This may be understood, either 1. of Iob himself; that he cast off all Reverence to God by uttering such bold and reproachful expressions concerning God and his Providence. Or 2. with respect to others; that by his insolent and unworthy speeches of and carriage towards God, and by those false and pernicious principles which he had laid down; as that God dealt with men in way of absolute Soveraignty, not of Justice; and that he made no difference between good and bad in the course of his Providence, but did equally prosper or afflict both of them: which tended to the subversion of the fear and worship of God.

As this Hebrew word signifies also, Psalm 102. 1. Or, meditation or speech; which well agrees to prayer which is accompanied with serious thoughts and expressions. The sense is, either 1. in stead of humble and servent prayer to God, which thy Condition calleth for, thou breathest forth false and blasphemous speeches against him. Or 2. Thou dost by thy words and examples, and principles, as far as in thee lies, banish prayer out of the world, by making it useless and unprofitable to men.

Marginal references: Heb. thou makest void.; Or, speech.