Water backs up in toilet bowl and there are np blockage the waist line. Water drains out very slowly.
Well, either there's something blocking the toilet's built-in drain path or you have a cast iron pipe that has rusted itself mostly shut, but still large enough to let the Drain Auger right through (this is the most common cause of your problem).
Remove the toilet and floss the toilet drain path with a Snake or Drain Auger. The cast iron pipe would need to be chiseled back to its full diameter with a screwdriver and maybe a gentle hammering. But, you'll need to vacuum-out ALL of the chiseling debris before re-installing the toilet, you don't want loose rust rusting out the rest of your plumbing.