Albert Barnes Commentary Job 5:8

"But as for me, I would seek unto God, And unto God would I commit my cause;" — Job 5:8 (ASV)

I would seek to God—Our translators have omitted here the adversative particle אוּלם 'ûlâm—but, yet, nevertheless—and have thus marred the connection. The meaning of Eliphaz, I take to be, “that since affliction is ordered by an intelligent Being, and does not spring out of the ground, therefore he would commit his cause to God, and look to Him.” Jerome has expressed it well: Quam ob rem ego deprecabor Dominum. Some have understood this as meaning that Eliphaz himself was in the habit of committing his cause to God, and that he exhorted Job to imitate his example. But the correct sense is that which regards it as counsel given to Job to look to God because afflictions are the result of intelligent design, and because God had shown Himself to be worthy of the confidence of people.

The latter point Eliphaz proceeds to argue in the following verses.