Gregory the Dialogist

Neither have I gone back from the commandments of His lips. I have hid the words of His mouth in my breast. As servants that serve well are ever intent upon their masters' countenances, that the things they may bid they may hear readily, and strive to fulfil; so the minds of the righteous in their bent are upon Almighty God, and in His Scripture they as it were fix their eyes on His face, that whereas God delivers therein all that He wills, they may not be at variance with His will, in proportion as they learn that will in His …

Morals on the Book of Job, Book XVI ↗

Thomas Aquinas

The second rule of human life is the exterior law transmitted by divine inspiration, against which a man sins in two ways: in one way by contempt, and against this he says, "I have not departed from the commandments of his lips." For some precepts had been divinely given to Noah and perhaps to some other holy men on whose lips God spoke. …

Commentary on Job ↗