Charles Ellicott Commentary Jeremiah 31:11

"For Jehovah hath ransomed Jacob, and redeemed him from the hand of him that was stronger than he." — Jeremiah 31:11 (ASV)

For the Lord has redeemed Jacob ... —Of the two verbs “redeem” and “ransom” here used, the first expresses the act of setting free, the other that of acting as the goel, or nearest kinsman, who was not only the liberator, but the avenger of those to whom he stood in that relation. (Deuteronomy 19:6; 2 Samuel 14:11; Isaiah 59:20; Psalms 19:14.) The idea of a “ransom,” however—i.e., of a price paid for freedom—does not lie in the Hebrew word.