Where is one of the earliest uses of the word redemption in the Old Testament?

Les teaches that Job 19:25 is one of the earlier uses of the word redemption in the Old Testament. Job writes, 'For I know that my Redeemer liveth,' and the context says Job understood it. Les defines redemption as losing control of something, then paying the price to buy it back. He also contrasts this with the parable of Luke 15, where the one lost lamb knew it was lost, but the ninety-nine did not.