Kāyagatāsatisutta

Suttapiṭaka · Majjhimanikāya · Vol. 14 · Section 313

[313] "Bhikkhus, suppose there were a water jar, full of water, filled to the very brim so that a crow could drink from it, set upon a stand. Then a man might come along carrying a load of water. What do you think, bhikkhus — would that man find a place to pour his water?" "Certainly not, venerable sir." "Even so, bhikkhus, in whomever mindfulness directed to the body (kāyagatā sati) has been developed and cultivated, Māra gains no opening in him; Māra gains no footing (ārammaṇa) in him."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.