Nikkhepakaṇḍa

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 868

[868] Therein, what is the sign of serenity (samathanimitta)? That which is stability of mind (citta) … right concentration (sammāsamādhi) — this is called the sign of serenity. Therein, what is the sign of exertion (paggāhanimitta)? That which is the mental arousing of energy (viriyārambha) … right effort (sammāvāyāma) — this is called the sign of exertion.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.