[636] Bhikkhus, there is a further case. The Teacher teaches the Dhamma to his disciples, being compassionate, seeking their welfare, out of compassion: "This is for your welfare; this is for your happiness." His disciples listen well, lend an ear, and set up their minds (citta) upon understanding (aññā); they do not proceed having turned aside from the Teacher's instruction. Therein, bhikkhus, the Tathāgata is pleased and feels pleasure, and he dwells unfestering, possessed of mindfulness and clearly comprehending. This, bhikkhus, is called the third establishment of mindfulness (satipaṭṭhāna) that the Noble One cultivates, cultivating which he is a Teacher fit to instruct a group. "There are three establishments of mindfulness that the Noble One cultivates, cultivating which he is a Teacher fit to instruct a group" — so it was said; and it was because of this that it was said.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.