Digha Nikaya 2:48
SUJATOIti ajjhattaṁ vā kāye kāyānupassī viharati …pe…
And so they meditate observing an aspect of the body internally …
Iti ajjhattaṁ vā kāye kāyānupassī viharati …pe…
And so they meditate observing an aspect of the body internally …