ShirleyW
There is no scripture. It's one of those modern man made WT rulz. Kinda like having people wash up to their elbows when a basic hand wash would suffice. You see, the Apostles didn't work for a book factory, therefore they had no need to punch time cards.
As a pioneer, my time was voluntary & volunteers don't punch time cards. I honestly didn't care if I made the time or not.
Most of the pioneers would drag out their day because they knew the time factor was an exercise in futility and quite redundant. Why would a religion require "quotas"?