[223] Which, on that occasion, is right concentration (sammāsamādhi)?
That which on that occasion is stability of the mind (citta), steadfastness, firmness, non-wavering, non-distraction, the state of unwavering mentality, calm (samatha), the faculty of concentration (samādhindriya), the power of concentration (samādhibala), right concentration, the concentration factor of awakening (samādhisambojjhaṅga), a factor of the path (maggaṅga), included in the path (maggapariyāpanna) — this, on that occasion, is right concentration.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.