Thus have I heard. Once the Lord was staying among the Kurus. There is a market-town of theirs called Kammasadhamma. And there the Lord addressed the monks: "Monks!" "Lord", they replied, and the Lord said:
That is to say the four foundations of mindfulness.
What are the four?
Here, monks, a monk abides contemplating body as body, ardent, clearly aware and mindful, having put aside hankering and fretting for the world.
Here, monks, a monk abides contemplating feelings as feelings, ardent, clearly aware and mindful, having put aside hankering and fretting for the world.
Here, monks, a monk abides contemplating mind as mind, ardent, clearly aware and mindful, having put aside hankering and fretting for the world.
Here, monks, a monk abides contemplating mind-objects as mind-objects, ardent, clearly aware and mindful, having put aside hankering and fretting for the world.