1At Sāvatthī. "Bhikkhus, there are these four kinds of meditators. What four?

"Here, bhikkhus, a meditator is skilled in concentration regarding concentration but not skilled in maintenance regarding concentration. [n.300] Na samādhismiṁ ṭhitikusalo. Spk: Not skilled in steadying the jhāna, unable to steady the jhāna for a mere seven or eight fingersnaps.
This skill may correspond to the "mastery in determination" (adhiṭṭhānavasī) described at Paṭis I 100: "He determines (the duration of) the first jhāna (etc.) where, when, and for as long as he wishes; he has no difficulty in determining (the duration)."

"Here a meditator is skilled in maintenance regarding concentration but not skilled in concentration regarding concentration.

"Here a meditator is skilled neither in concentration nor in maintenance regarding concentration.

"Here a meditator is skilled both in concentration and in maintenance regarding concentration.

"Therein, bhikkhus, the meditator who is skilled both in concentration and in maintenance regarding concentration sn.iii.265 is the chief, the best, the foremost, the supreme, the most excellent of these four kinds of meditators.

"Just as, bhikkhus, from a cow comes milk … and from ghee comes cream-of-ghee, which is reckoned the best of all these, so too the meditator who is skilled both in concentration and in maintenance regarding concentration … is the most excellent of these four kinds of meditators."

1Sāvatthinidānaṁ. "Cattārome, bhikkhave, jhāyī. Katame cattāro?

Idha, bhikkhave, ekacco jhāyī samādhismiṁ samādhikusalo hoti, na samādhismiṁ ṭhitikusalo.

Idha pana, bhikkhave, ekacco jhāyī samādhismiṁ ṭhitikusalo hoti, na samādhismiṁ samādhikusalo.

Idha pana, bhikkhave, ekacco jhāyī neva samādhismiṁ samādhikusalo hoti, na ca samādhismiṁ ṭhitikusalo.

Idha pana, bhikkhave, ekacco jhāyī samādhismiṁ samādhikusalo ca hoti, samādhismiṁ ṭhitikusalo ca.

Tatra, bhikkhave, yvāyaṁ jhāyī samādhismiṁ samādhikusalo ca hoti samādhismiṁ ṭhitikusalo ca ayaṁ imesaṁ catunnaṁ jhāyīnaṁ aggo ca seṭṭho ca mokkho ca uttamo ca pavaro ca.

Seyyathāpi, bhikkhave, gavā khīraṁ, khīramhā dadhi, dadhimhā navanītaṁ, navanītamhā sappi, sappimhā sappimaṇḍo tatra aggamakkhāyati; evameva kho, bhikkhave, yvāyaṁ jhāyī samādhismiṁ samādhikusalo ca hoti samādhismiṁ ṭhitikusalo ca ayaṁ imesaṁ catunnaṁ jhāyīnaṁ aggo ca seṭṭho ca mokkho ca uttamo ca pavaro cā"ti.

Dutiyaṁ.