[253] What at that time is calm (samatha)?
That which at that time is stability of mind (citta), steadfastness, steadiness, non-scattering, non-distraction, the state of unscattered mentality, calm, the faculty of concentration (samādhindriya), the power of concentration (samādhibala), right concentration (sammāsamādhi), the concentration factor of awakening (samādhisambojjhaṅga), a factor of the path (maggaṅga), included in the path (maggapariyāpanna) — this at that time is calm.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.