Digha Nikaya 2:332
SUJATOYo hi koci, bhikkhave, ime cattāro satipaṭṭhāne evaṁ bhāveyya sattavassāni, tassa dvinnaṁ phalānaṁ aññataraṁ phalaṁ pāṭikaṅkhaṁ
Anyone who develops these four kinds of mindfulness meditation in this way for seven years can expect one of two results: