"free them from their captivity." The abstract noun "captivity" can be translated as a verbal clause. See how you translated similar words in [Jeremiah 29:14](../29/14.md). Alternate translation: "free them from those who had captured them" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
Yahweh speaks of himself by name to express the certainty of what he is declaring. See how you translated this in [Jeremiah 1:8](../01/08.md). Alternate translation: "this is what Yahweh has declared" or "this is what I, Yahweh, have declared" (See: [[rc://en/ta/man/translate/figs-123person]])