There is a beautiful phrase in AN6.70 ,
bhikkhu santena samādhinā paṇītena paṭippassaddhiladdhena ekodibhāvādhigatena…
I believe the meaning you are looking for and more is condensed in the the word ‘paṭippassaddhi’.
There’s a workshop that was given recently by Ajahn Brahmali on Samma Samadhi in case you’re interested.(with copious amounts of sutta references in the slides provided) Sammāsamādhi (right stillness) Workshop I - Part 1 | Ajahn Brahmali | 26 November 2022 - YouTube
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