Job 42:8

He would have not ordered that if there had been the law, but now he becomes priest, while they bring offerings. Job had made sacrifices for his children; now he makes them for his friends. See how the text shows that Job is devoid of resentment. God takes [Job's friends] as witnesses of the virtue of the man, and equally he shows the gravity of their fault through the extraordinary importance of the offering. He would have not needed such great victims if the faults to be expiated had not been so serious. He also shows that the sacrifice was not sufficient, "for," he says, "but for his sake," I would have not healed you from your guilt. In this manner he shows that he has forgiven them as well. "I would have destroyed you," he says, "for but for his sake," "because you have not spoken the truth against my servant Job." Notice that even though they could speak with zeal as much as they wanted, they were accused just the same of saying nothing true, or rather, they did not speak with the zeal that is fitting to God. In that case, they would have been forgiven. This is also the reason why Job attacked them. Through this we learn that the one who accuses the righteous will have to expiate a serious fault.

Take unto you seven bulls, and seven rams, and go to My servant Job, and offer up for yourselves a whole burnt offering. But My servant Job shall pray for you; his face I will accept, that folly be not imputed to you. 11. Behold the just and merciful God neither passes over their faults without reproof, nor yet leaves their guilt without conversion. For since He is our inward Physician, He first made known the corruptions of our wound, and afterwards pointed out the remedies for obtaining health. But we have already often said, [Pref. chap. 6] that the friends of blessed Job represent heretics, who offend God, while they endeavour to defend Him; for they are in their words rebels against the truth, which they imagine they are serving by their false assertions. Because therefore Almighty God frequently incorporates them into the body of Holy Church, through the knowledge of the truth; their conversion also, which is often mercifully effected, is well designated by this pardon which the friends of Job obtain. 12. But it must be specially observed, that they are ordered to offer to the Lord the sacrifice of their conversion, not by themselves, but by Job. Heretics doubtless, when they come back from their error, cannot appease the wrath of God towards them by a sacrifice offered by themselves, unless they are converted to the Catholic Church, which blessed Job designates; that so they may obtain their salvation by her prayers whose faith they used to impugn with their false assertions. For He says; My servant Job will pray for you; his face I will accept, that folly be not imputed to you. As if He openly said to heretics. I accept not your sacrifices, I hear not the words of your petitions, except through the intercession of her, whose words of confession concerning Me I acknowledge true. And do ye indeed bring down bulls and rams to offer the sacrifices of your conversion, but ask of Me your salvation through the Catholic Church, which I love. For I wish to remit to her the sin which ye have committed against Me in her, in order that she may obtain your recovery, who used to suffer from your sickness. 13. For it is she alone through whom God willingly accepts a sacrifice, she alone who intercedes with confidence for those who are in error. Whence also the Lord commanded concerning the sacrifice of the lamb, saying; In one house it shall be eaten, neither…