That's right, they need a scripture. The Watchtower can throw away the entire Bible with the exception of a scripture and do very well for themselves.
Here is a scripture the Watchtower needs:
Matt 24:45 “Who then is a faithful and sensible slave, whom his master has put in charge of his household, to give them food at the proper time?
The Watchtower needs no other scripture than Matthew 24:45 to continue with their God dishonoring religion. That is why they can never let go of their false 607 B.C. date for the fall of Jerusalem by Nebuchadnezzar II.