Gregory the Dialogist

My bowels boiled, and rested not. The days of affliction prevented me. Since for 'the bowels' of Holy Church 'to boil' is for her to endure in the fierceness of persecution, these very persons too, whom she had before in the love of the faith carried as 'bowels.' Which same first acquainting themselves with her secrets, in the same proportion as they know where she suffers the greatest pain, to so much the worse degree never rest from the afflicting of her; which persons however even in the time of her peace she bears heavily with, …

Morals on the Book of Job, Book XX ↗

Thomas Aquinas

He explains then the evils overcoming him, and he begins with interior evils when he says, "My bones are inflamed without rest." This can refer to the weakness of the interior powers coming from too much heat, and also to the affliction of the heart proceeding from the intensity of the heat of pain. To show this kind of turmoil is too early, he says, "Days of affliction have anticipated me." For all men suffer in their old age from ill health, but he has been anticipated with afflictions in his youth.

Commentary on Job ↗