Lay thine hand upon him - Prof. Lee renders this, very improperly, as it seems to me, “Lay thine hand on thy mouth respecting him,” supposing it means that he should be awed into silence by dread of the animal referred to. But the meaning of the passage evidently is, “Endeavor to seize him by laying the hand on him, and you will soon desist from the fearful conflict, and will not renew it.”
Remember the battle - Remember what a fearful conflict will ensue. Perhaps there is an allusion to some fact fresh in the mind of Job, where such an attempt had been made to secure the leviathan, attended with fearful disaster to those who had made the attempt.
Do no more - Or, rather, “Thou wilt not do it again.” That is, he would be deterred from ever renewing the attempt, or the conflict would be fatal to him.