Sing unto the LORD with thanksgiving; sing praise upon the harp unto our God:
Sing unto the Lord with thanksgiving - literally, 'answer;' i:e., 'sing ye responsively' (Ezra 3:11) (DeBurgh). Rather, 'respond unto the Lord with thanksgiving' - i:e., let your thanksgiving be the corresponding return to His graciously bestowed salvation. So Psalms 119:172, "Speak of thy word" - Hebrew, respond to.