Charles H. Spurgeon on Psalms 107:2

Redeemed. Moses has given us in the law a clear and full idea of what we are to understand by the word gal, here rendered "redeemed." If any person was either sold for a slave or carried away for a captive, then his kinsman, who was nearest to him in blood, had the right and equity of redemption. But no other person was suffered to redeem. And such a kinsman was called "the redeemer", when he paid down the price for which his relation was sold to be a slave, or paid the ransom for which he was led captive. And there is another remarkable instance in the law, wherein it was provided, that in any case any person was found murdered, then the nearest to him in blood was to prosecute the murderer, and to bring him to justice, and this nearest relation thus avenging the murder is called by the same name, a redeemer. And how beautifully is the office of our great Redeemer represented under these three instances; he was to us such a Redeemer in spirituals, as these were in temrporals: for sin had brought all mankind into slavery and captivity, and had murdered us ...This most high God, who was also man, united in one Christ, came into the world to redeem us, and the same person being both God and man, must merit for us as God in what he did for us as man. Accordingly, by the merits of his obedience and sufferings, he paid the price our redemption, and we were no longer the servants of sin; and by his most precious blood shed upon the cross, by his death and resurrection, he overcame both death, and him who had the power of death, and by delivering us in this manner from slavery and captivity, he fulfilled the third part of the Redeemer's office: for Satan was the murderer from the beginning, who had given both body and soul a mortal wound of sin, which was certain death and eternal misery, and the Redeemer came to avenge the murder. He took our cause in hand, as being our nearest kinsman, and it cost him his own life to avenge ours. —William Romaine.