The Tipiṭaka in Three Languages

Suññatavāra

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 305

[305] Which at that time is calm (samatha)? That which at that time is stability of the mind (citta), steadfastness, steadiness, non-wavering, non-distraction, the state of unwavering mentality, calm, the faculty of concentration (samādhindriya), the power of concentration (samādhibala), wrong concentration (micchāsamādhi) — this at that time is calm.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places