Parinneyyasutta 1.5

1.5

Imesaṃ kho, bhikkhave, catunnaṃ ariyasaccānaṃ atthi ariyasaccaṃ pariññeyyaṃ, atthi ariyasaccaṃ pahātabbaṃ, atthi ariyasaccaṃ sacchikātabbaṃ, atthi ariyasaccaṃ bhāvetabbaṃ.

Of these four noble truths, there is one to be completely understood, one to be given up, one to be realized, and one to be developed.