Digha Nikaya 16 (dn16:1.7.8)

Yāvakīvañca, bhikkhave, bhikkhū na pāpicchā bhavissanti na pāpikānaṁ icchānaṁ vasaṁ gatā, vuddhiyeva, bhikkhave, bhikkhūnaṁ pāṭikaṅkhā, no parihāni.