[593] Sāvatthī. "Bhikkhus, there are these four kinds of meditators (jhāyī). What four? Here, bhikkhus, a certain meditator is skilled in concentration (samādhi) regarding concentration, but does not practice persistently (sātaccakārī) in concentration. Here again, bhikkhus, a certain meditator practices persistently in concentration, but is not skilled in concentration regarding concentration. Here again, bhikkhus, a certain meditator is neither skilled in concentration regarding concentration, nor does he practice persistently in concentration. Here again, bhikkhus, a certain meditator is both skilled in concentration regarding concentration and practices persistently in concentration. Therein, bhikkhus, the meditator who is both skilled in concentration regarding concentration and practices persistently in concentration — this one is, of these four meditators, the foremost, the best, the pre-eminent, the highest, and the most excellent. Just as, bhikkhus, from a cow comes milk … and the most excellent."
End of the eighth sutta.
9. The Sātaccakārī Sutta
One who is skilled in concentration and practices persistently in concentration is reckoned the foremost.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.