sn46.35:2.1 “Yoniso ca kho, bhikkhave, manasikaroto anuppanno ceva satisambojjhaṅgo uppajjati, uppanno ca satisambojjhaṅgo bhāvanāpāripūriṁ gacchati …pe… anuppanno ceva upekkhāsambojjhaṅgo uppajjati, uppanno ca upekkhāsambojjhaṅgo bhāvanāpāripūriṁ gacchatī”ti.