[218] What is the power of serenity (samathabala)? One-pointedness of mind (citta), non-distraction, through the power of renunciation (nekkhamma) is the power of serenity. One-pointedness of mind, non-distraction, through the power of non-ill will (abyāpāda) is the power of serenity. One-pointedness of mind, non-distraction, through the power of the perception of light (ālokasaññā) is the power of serenity. One-pointedness of mind, non-distraction, through the power of non-distraction (avikkhepa) is the power of serenity. … One-pointedness of mind, non-distraction, through the power of the in-breath (assāsa) in one contemplating relinquishment (paṭinissaggānupassī) is the power of serenity. One-pointedness of mind, non-distraction, through the power of the out-breath (passāsa) in one contemplating relinquishment is the power of serenity.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.