Majjhima Nikaya (Coleção dos Discursos Médios) 3:133
SUJATOKathaṁ bhāvitā ca, bhikkhave, satta bojjhaṅgā kathaṁ bahulīkatā vijjāvimuttiṁ paripūrenti?
And how are the seven awakening factors developed and cultivated so as to fulfill knowledge and freedom?