The Tipiṭaka in Three Languages

Cittuppādakaṇḍa

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 69

[69] What on that occasion is serenity (samatha)? That which on that occasion is stability of the mind (citta), steadfastness, steadiness, non-wavering, non-distraction, the state of an unwavering mind, serenity, the concentration faculty (samādhindriya), the concentration power (samādhibala), right concentration (sammāsamādhi) — this on that occasion is serenity.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places