增壹阿含經 3.8.p8

3.8.p8

“‘Breathing’ means observing and knowing, ‘Now my breaths are long,’ when one’s breaths are long. It means observing and knowing, ‘Now my breaths are short,’ when one’s breaths are short. It means observing and knowing, ‘Now my breaths are very cold,’ when one’s breaths are cold. It means observing and knowing, ‘Now my breaths are hot,’ when one’s breaths are hot. The practitioner fully observes their body, observing and knowing it from head to toe.