Digha Nikaya 12 (dn12:3.6)

So dhammaṁ deseti ādikalyāṇaṁ majjhekalyāṇaṁ pariyosānakalyāṇaṁ sātthaṁ sabyañjanaṁ kevalaparipuṇṇaṁ parisuddhaṁ brahmacariyaṁ pakāseti.