כִּ֤י גֶֽחָלִ֗ים אַ֭תָּה חֹתֶ֣ה עַל־רֹאשׁ֑וֹ וַֽ֝יהוָ֗ה יְשַׁלֶּם־לָֽךְ׃
sebab dengan demikian engkau mengambil bara api dari perapian dan menaruhnya di atas kepalanya, dan Yang Mahakekal akan memberi upah kepadamu.
Malbim
Job pours great scorn (Ezekiel 23:32) on Zophar's philosophical method, that by which he had determined that since we possess knowledge only by reason of our senses as they apprehend the exterior of things, and we do not perceive the reality of things as they are in themselves, it is conceivable that though a person may appear to be righteous according to our sense perception, he is in truth wicked and is deserving of perdition and torment by reference to his inner spiritual essence. Is there anything more ludicrous, asks Job, than that a person who appears to be virtuous in all his acts and beyond suspicion, should be told that he does not really know his own mind or its intrinsic state, in terms of which he may be both wicked, and a sinner, and deserving of misfortunes? (Job 12:5), Is it conceivable that God created man in such an evil and bitter manner (Jeremiah 2:19) for scorn and for ridicule (Ezekiel 23:32); so that his calm and secure thoughts (Amos 6:1) about his righteousness are as a burning torch inside him (Isaiah 62:1) heaping coals of fire (Proverbs 25:22) and mockery on his head? For not knowing his soul (Proverbs 14:9) nor trusting his life (Job 24:22), he is perhaps a criminal and guilty, but does not know it! (Ch.12:3-4).
Ibn Ezra
לחתות אש To take fire. Comp. יחתה אש he takes fire (Prov. 6:27). גחלים אתה חותה thou shalt heap coals of fire (ib. 25:22). במכתתו In the bursting of it. Derived from כתת, a verb ע׳ע.19The Hebrew text has והוא מפעלי הכפל it is a verb ע״ע; but it is impossible to suppose, that I. E. meant to say, that לחתות is derived from התת, since he quotes as a parallel חותה, which can only be the participle Kal of חתה. Before והוא either כתות or במכתתו with some explanation is wanting. The commentary on the whole verse is rather deranged; the remark on לחשוף is interrupted by the explanation of גבא.