The seventh bracha of Shemoneh Esrei is called “Geulah” (redemption). Its opening words (“behold our affliction”) are a paraphrase of words used by King David in several Psalms, including this one. The ibn Ezra tells us that in this verse, David is not describing a physical struggle but rather his battle with the yetzer hara (evil inclination). This explains his request that G-d take away his sins.