'Redeemed of the Lord' in the Bible

Let the redeemed of the LORD say so, whom he hath redeemed from the hand of the enemy;

Therefore the redeemed of the LORD shall return, and come with singing unto Zion; and everlasting joy shall be upon their head: they shall obtain gladness and joy; and sorrow and mourning shall flee away.

And they shall call them, The holy people, The redeemed of the LORD: and thou shalt be called, Sought out, A city not forsaken.