4.
The Discourse on the Sal Tree
370.
On one occasion the Blessed One was dwelling among the Kosalans at Sālā, a brahmin village.
There the Blessed One addressed the monks, etc.
said this -
"Those monks, monks, who are new, recently gone forth, newly come to this Teaching and discipline - those monks, monks, should be encouraged, settled, and established by you in the development of the four establishments of mindfulness. Which four? Come, friends, dwell observing the body in the body, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for knowledge of the body as it really is; dwell observing feelings in feelings, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for knowledge of feelings as they really are; dwell observing mind in mind, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for knowledge of mind as it really is; dwell observing mental phenomena in mental phenomena, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for knowledge of mental phenomena as they really are. Those monks, monks, who are trainees, who have not attained their goal, dwelling aspiring for the unsurpassed freedom from bondage - they too dwell observing the body in the body, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for the full understanding of the body; they dwell observing feelings in feelings, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for the full understanding of feelings; they dwell observing mind in mind, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for the full understanding of mind; they dwell observing mental phenomena in mental phenomena, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, for the full understanding of mental phenomena.
"Those monks, monks, who are Worthy Ones, who have eliminated the mental corruptions, who have lived the holy life, who have done what had to be done, who have laid down the burden, who have attained their own welfare, who have utterly eliminated the fetters of existence, who are completely liberated through final knowledge - they too dwell observing the body in the body, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, unbound from the body; they dwell observing feelings in feelings, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, unbound from feelings; they dwell observing mind in mind, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, unbound from mind; they dwell observing mental phenomena in mental phenomena, ardent, fully aware, unified, with clear mind, concentrated, with unified mind, unbound from mental phenomena.
"Those monks, monks, who are new, recently gone forth, newly come to this Teaching and discipline - those monks, monks, should be encouraged, settled, and established by you in the development of these four establishments of mindfulness." The fourth.