Akankheyyasutta 19.2

19.2

sīlesvevassa paripūrakārī ajjhattaṃ cetosamathamanuyutto anirākatajjhāno vipassanāya samannāgato brūhetā suññāgārānaṃ.

So let them fulfill their precepts, be committed to inner serenity of the heart, not neglect absorption, be endowed with discernment, and frequent empty huts.