Digha Nikaya 2:113
SUJATOKathañca pana, bhikkhave, bhikkhu dhammesu dhammānupassī viharati?
And how does a mendicant meditate observing an aspect of principles?
Kathañca pana, bhikkhave, bhikkhu dhammesu dhammānupassī viharati?
And how does a mendicant meditate observing an aspect of principles?