20-27.
The Eight Discourses Beginning with Duration as Root with Emergence
681-688.
At Sāvatthī.
"Monks, there are these four meditators.
Which four?
Here, monks, a certain meditator is skilled in duration regarding concentration, but not skilled in emergence regarding concentration.
Here again, monks, a certain meditator is skilled in emergence regarding concentration, but not skilled in duration regarding concentration.
Here again, monks, a certain meditator is neither skilled in duration regarding concentration, nor skilled in emergence regarding concentration.
Here again, monks, a certain meditator is both skilled in duration regarding concentration and skilled in emergence regarding concentration.
Therein, monks, the meditator who etc.
the highest and the most excellent."
The twentieth.