Ud 7.8

Kaccānasutta

Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā sāvatthiyaṁ viharati jetavane anāthapiṇḍikassa ārāme. Tena kho pana samayena āyasmā mahākaccāno bhagavato avidūre nisinno hoti pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya kāyagatāya satiyā ajjhattaṁ parimukhaṁ sūpaṭṭhitāya.

Kaccāna

So I have heard. At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery. Now at that time Venerable Mahākaccāna was sitting not far from the Buddha, cross-legged, with his body straight and mindfulness of the body well-established internally on the present.

Addasā kho bhagavā āyasmantaṁ mahākaccānaṁ avidūre nisinnaṁ pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya kāyagatāya satiyā ajjhattaṁ parimukhaṁ sūpaṭṭhitāya.

The Buddha saw him meditating there.

Atha kho bhagavā etamatthaṁ viditvā tāyaṁ velāyaṁ imaṁ udānaṁ udānesi:

Then, understanding this matter, on that occasion the Buddha expressed this heartfelt sentiment:

“Yassa siyā sabbadā sati, Satataṁ kāyagatā upaṭṭhitā; No cassa no ca me siyā, Na bhavissati na ca me bhavissati; Anupubbavihāri tattha so, Kāleneva tare visattikan”ti.

“Their mindfulness would always be established in the body, constant: ‘It might not be, and it might not be mine, It will not be, and it will not be mine.’ Meditating stage by stage on that, in time they’d cross over clinging.”