JhānavibhaṅgaSuttantabhājanīya

Abhidhammapiṭaka · Vibhaṅga · Vol. 35 · Section 661

[661] "Unification of mind (cetaso ekodibhāva)": that which is stability of the mind (citta) … right concentration (sammāsamādhi).

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.