[610] At Sāvatthī. …
One acts with care (sakkaccakārī) with regard to concentration (samādhi), but does not act with persistence (sātaccakārī) with regard to concentration. One acts with persistence with regard to concentration, but does not act with care with regard to concentration. One neither acts with care with regard to concentration nor acts with persistence with regard to concentration. One both acts with care with regard to concentration and acts with persistence with regard to concentration. Therein, bhikkhus, the meditator (jhāyī) who … is the highest and the most excellent.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.