Silavantasutta 2.3

2.3

Ṭhānaṃ kho panetaṃ, āvuso, vijjati yaṃ sotāpanno bhikkhu ime pañcupādānakkhandhe aniccato …pe… anattato yoniso manasi karonto sakadāgāmiphalaṃ sacchikareyyā”ti.

It’s possible that a mendicant stream-enterer who rationally applies the mind to the five grasping aggregates will realize the fruit of once-return.”