Eliphaz wants to explain things to Job (Job 15:17-15:19)

“I will show you.
Listen to me!
What I have seen
I will declare!
What sages have told me!
Their ancestors have not hidden,
The land was given to them alone.
No stranger passed among them.”

Eliphaz wanted to show Job about his wisdom. He wanted Job to listen to him. He was going to tell Job what he had seen and what his ancestors had told him. There were no strangers in his land.