‘Jesus told them, “This is the only work God wants from you: Believe in the one he has sent.”’ (John 6:29 NLT).

ONLY ONE WORK, NOT WORKS.
Jesus told those who wanted to know what “works” they needed to do in order to please God, that only one “worK” was needed. What was that work? It is the work of faith. It is the “only work God wants,” that we might “believe” in His only begotten Son, Jesus Christ.