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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.