Majjhima Nikaya 3:68
SUJATO‘Cittapaṭisaṁvedī assasissāmī’ti sikkhati, ‘cittapaṭisaṁvedī passasissāmī’ti sikkhati;
They practice like this: ‘I’ll breathe in experiencing the mind.’ They practice like this: ‘I’ll breathe out experiencing the mind.’
‘Cittapaṭisaṁvedī assasissāmī’ti sikkhati, ‘cittapaṭisaṁvedī passasissāmī’ti sikkhati;
They practice like this: ‘I’ll breathe in experiencing the mind.’ They practice like this: ‘I’ll breathe out experiencing the mind.’