Dutiyakalasutta 2.2

2.2

Evamevaṃ kho, bhikkhave, ime cattāro kālā sammā bhāviyamānā sammā anuparivattiyamānā anupubbena āsavānaṃ khayaṃ pāpentī”ti.

In the same way, when these four times are rightly developed and reiterated, they gradually lead to the ending of defilements.”