All that he hath is in thy power - Margin, as in Hebrew “hand.” That is, all this is now committed to thee, for it is manifest that hitherto Satan had no power to injure even his property. He complained that God had made a hedge around all that Job possessed. Now it was all entrusted to him in order that he might make full trim of the faith of Job. The grant extended to his sons and daughters as well as to his property.
Only upon himself put not forth thine hand - Job himself was not to be visited with sickness nor was his life to be taken. The main accusation of Satan was, that Job was virtuous only because God encompassed him with so many blessings, and especially because he had endowed him with so much property. The trial, therefore, only required that it should be seen whether his piety was the mere result of these blessings.
So Satan went forth from the presence of the Lord - That is from the council which had been convened; see the notes at Job 1:6.