​MN 10 Satipatthana Sutta: The Foundations of Mindfulness 

Thus have i heard. 

​On one occasion the Blessed One was living in the Kuru country at a town of the Kurus named Kammasadhamma. There he addressed the bhikkhus thus: "Bhikkhus, this is the direct path for the purification of beings, for the surmounting of sorrow and lamentation, for the disappearance of pain and grief, for the attainment of the true way, for the realization of Nibbana - namely these four foundations of mindfulness. What are the four? Here, bhikkhus, a bhikkhu abides contemplating the body as a body, ardent, fully aware, and mindful, having put away covetousness and grief for the world. He abides contemplating feelings as feelings.... He abides contemplating mind as mind....He abides contemplating mind-objects as mind-objects, ardent, fully aware, and mindful, having put away covetousness and grief for the world.

CONTEMPLATION OF THE BODY

1. Mindfulness of Breathing 

Buddha: "And how bhikkhus, does a bhikkhu abide contemplating the body as a body? Here a bhikkhu having gone to the forest or to the root of a tree or to an empty hut, sits down; having folded his legs crosswise, set his body erect and established mindfulness in front of him, being mindful as he breathes in, being mindful as he breathes out. Breathing in long, he understands he breathes in long likewise breathing out long, he understands.
Breathing in short, he understands: 'I breathe in short and i breath out short'. He trains thus: 'I shall breathe in ad out experiencing the whole body of breath'. He trains thus: 'I shall breathe in  and breath out tranquilizing the bodily formation'. Just as a skilled turner or his apprentice, when making a long turn, understands: 'I make a long turn'; or, when making a short turn, understands: 'I make a short turn'; so too, breathing in long, a bhikkhu understands: 'I breathe in long'..... 

INSIGHT

"In this way he abides contemplating the body as a body internally, or he abides contemplating the body as a body externally, or he abides contemplating the body as a body both internally-and externally. Or else he abides contemplating in the body its arising factors, or he abides contemplating in the body its vanishing factors, or he abides contemplating in the body both its arising and vanishing factors. Or else mindfulness that 'there is a body' is simply established in him to the extent necessary for bare knowledge and mindfulness. And he abides independent, not clinging to anything in the world. That is how a bhikkhu abides contemplating the body as a body. 

2. The Four Postures

Buddha:  Again, bhikkhus, when walking, a bhikkhu understands: 'I am walking'; when standing, he understands: 'I am standing'; when sitting he understands: 'I am sitting'; when lying down, he understands: 'I am lying down'; or he understands accordingly however his body is disposed. In this way he abides contemplating the body as a body internally, externally ....And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body. 

​3. Full Awareness with clear comprehension

"Again, bhikkhus, a bhikkhu is one who acts in full awareness when going forward and returning; who acts in full awareness when looking ahead and looking away; who acts in full awareness when flexing and extending his limbs; who acts in full awareness when wearing his robes and carrying his outer robe and bowl; who acts in full awareness when eating, drinking, consuming food and tasting; who acts in full awareness when defecating and urinating; who acts in full awareness when walking, standing, sitting, falling asleep, waking up, talking, and keeping silent. In this way he abides contemplating the body as a body internally, externally, and both internally and externally.. .And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body. 

4. Reflection of Foulness - The Bodily Parts

"Again, bhikkhus, a bhikkhu reviews this same body up from the soles of the feet and down from the top of the hair, bounded by skin, full of many kinds of impurity thus: In this body there are head-hairs, body-hairs, nails, teeth, skin, flesh, sinews, bones, bone-marrow, kidneys, heart, liver, diaphragm, spleen, lungs, large intestines, small intestines, contents of the stomach, feces, bile, phlegm, pus, blood, sweat, fat, tears, grease, spittle, snot, oil of the joints, and urine.' Just as though there were a bag with an opening at both ends full of many sorts of grain and a man with good eyes were to open it and review it thus: 'This is hill rice, this is red rice, these are beans.....'; so too, a bhikkhu reviews this same body...as full of many kinds of impurity thus: Tn this body there are head-hairs...and urine.'
In this way he abides contemplating the body as a body internally, externally, and both internally and externally.. .And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body. 

​5. Reflection of material Elements

"Again, bhikkhus, a bhikkhu reviews this same body, however it is placed, however disposed, as consisting of elements thus: 'In this body there are the earth element, the water element, the fire element and the air element.' Just like a skilled butcher or his apprentice had killed a cow and with it cut up into pieces; so too, a bhikkhu reviews this same body...as consisting of elements thus: 'In this body there are the earth element, the water element, the fire element, and the air element.'
In this way he abides contemplating the body as a body internally, externally, and both internally and externally.. .And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body. 

6-14. The Nine Charnel Ground Contemplations

"Again, bhikkhus, as though he were to see a corpse thrown aside in a charnel ground, a few days dead, bloated, livid, and oozing matter, a bhikkhu compares this same body with it thus: 'This body too is of the same nature, it will be like that, it is not exempt from that fate.'
In this way he abides contemplating the body ....And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body.

"Again, as though he were to see a corpse thrown aside in a charnel ground, being devoured by crows, hawks, vultures, or various kinds of worms, a bhikkhu compares this same body with it thus: "This body too is of the same nature, it will be like that, it is not exempt from that fate.' .That too is how a bhikkhu abides contemplating the body as a body.

"Again, as though he were to see a corpse thrown aside in a charnel ground, a skeleton with flesh and blood, held together with sinews...a flesh-less skeleton smeared with blood, held together with sinews...a skeleton without flesh and blood, held together with sinews...disconnected bones scattered in all directions - a bhikkhu compares this same body with it thus: 'This body too is of the same nature, it will be like that, it is not exempt from that fate.' That too is how a bhikkhu abides contemplating the body as a body.

"Again, as though he were to see a corpse thrown aside in a charnel ground, bones bleached white, ... bones heaped up, ...bones rotted and crumbled to dust, a bhikkhu compares this same body with it thus: 'This body too is of the same nature, it will be like that, it is not exempt from that fate.' 

(INSIGHT) 31. "In this way he abides contemplating the body as a body internally, or he abides contemplating the body as a body externally, or he abides contemplating the body as a body both internally and externally. Or else he abides contemplating in the body its arising factors, or he abides contemplating in the body its vanishing factors, or he abides contemplating in the body both its arising and vanishing factors. Or else mindfulness that 'there is a body' is simply established in him to the extent necessary for bare knowledge and mindfulness. And he abides independent, not clinging to anything in the world. That too is how a bhikkhu abides contemplating the body as a body. 
(CONTEMPLATION OF FEELING) 32. "And how, bhikkhus, does a bhikkhu abide contemplating feelings as feelings?152 Here, when feeling a pleasant feeling, a bhikkhu understands: 'I feel a pleasant feeling'; when feeling a painful feeling, he understands: 'I feel a painful feeling'; when feeling a neither-painful-nor-pleasant feeling, he understands: 'I feel a neither-painful-nor-pleasant feeling.' When feeling a worldly pleasant feeling, he understands: 'I feel a worldly pleasant feeling'; when feeling an unworldly pleasant feeling, he understands: 'I feel an unworldly pleasant feeling'; when feeling