Job 42:10 - Matthew Poole's English Annotations on the Holy Bible

Turned the captivity of Job, i.e. brought him out of that state of bondage in which he had been so long held by Satan and by his own Spirit, and out of all his distresses and miseries. Or, returned Job's captivity, i.e. the persons and things which had been taken from him; not the same which he had lost, but other equivalent to them, and that with advantage. When he prayed for his friends; whereby he manifesteth his obedience to God, and his true love and charity to them, in being so ready to forgive them, and heartily to pray for them; for which God would not let him lose his reward. Also; an emphatical particle. He not only gave him as much as he lost, but double to it.