Matthew Poole and continuators on Job 30:27

27. My bowels boiled and rested not : the days of affliction prevented me .

i. e. My inward parts boyled 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 Isa. 16. 11. Col. 3. 12. and elsewhere, of which he spake v. 25. to which he subjoyns the contrary usage which he met with, v. 26. And then in this first part of v. 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 boyling of the Bowels or inward parts; as Lam. 1. 20.

i. e. Came upon me suddenly and unexpectedly, when I promised to my self peace and prosperity, as the usual recompence which God promiseth and giveth to such as fear and please him, as I have done.