Gregory the Dialogist

And He said not, Where is God, Who made me? It is the practice of Holy Scripture, to pass suddenly from the singular to the plural, and to turn itself from the plural to the singular. Whence Eliu, when saying, They will cry and wail, did not subjoin, They said not, Where is God? but, He said not, Where is God? For, coming from the plural to the singular, he suddenly passed over to the person of each of the weak. …

Morals on the Book of Job, Book XXVI ↗

Thomas Aquinas

Then he turns himself to rejecting the other thing Job said, "what is right does not please you," which is repugnant to divine wisdom. Surely this wisdom first appears in the creation of things, and so he says, "And Job did not say," because he does not think that good things pleased God, "where is the God who made me?" For God made things only for the good, as we read in Genesis, "God saw that it was good, etc." Therefore, it is clear that good pleases God. …

Commentary on Job ↗