Eliphaz poses this question to make the point that there is no one Job can turn to for help. AT: "Is there a holy one to whom you may turn?" or "There is no holy one to whom you can turn for help." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This refers to any silly person and any foolish person. (See: [[rc://en/ta/man/translate/figs-genericnoun]])
# a foolish person taking root
Here a person is spoken of as if he were a plant, perhaps becoming more foolish over time. AT: "a foolish person becoming grounded in foolishness" (See: [[rc://en/ta/man/translate/figs-metaphor]])
# his home
This refers to the person's family and all his property.