My inward parts boiled without ceasing. The bowels are the seat of passion and of compassion; and therefore this may be understood, either,
1. Of his compassionate and deep sense of others miseries; which is oft expressed by bowels, as Isaiah 16:11 Colossians 3:12, and elsewhere, of which he spoke Job 30:25, to which he subjoins the contrary usage which he met with, Job 30:26. And then, in this first part of Job 30:27, he renews the mention of his compassion to others, and in the latter part he adds, by way of antithesis or opposition, that his mercy was requited with cruel afflictions. Or,
2. Of the grievousness of his troubles, which is sometimes expressed by the troubling or boiling of the bowels, or inward parts; as Lamentations 1:20. Prevented me, i.e. came upon me suddenly and unexpectedly, when I promised to myself peace and prosperity, as the usual recompence which God promiseth and giveth to such as fear and please him, as I have done.