Passage
Itivuttaka 16 (iti16:2.1)
pli iti
“Sekhassa, bhikkhave, bhikkhuno appattamānasassa anuttaraṁ yogakkhemaṁ patthayamānassa viharato ajjhattikaṁ aṅganti karitvā nāññaṁ ekaṅgampi samanupassāmi yaṁ evaṁ bahūpakāraṁ yathayidaṁ, bhikkhave, yoniso manasikāro.