Trung Bộ Kinh (Majjhima Nikaya) 3:106
SUJATOEvaṁ bhāvitā kho, bhikkhave, ānāpānassati evaṁ bahulīkatā cattāro satipaṭṭhāne paripūreti.
That’s how mindfulness of breathing, when developed and cultivated, fulfills the four kinds of mindfulness meditation.