Mallikasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā mallesu viharati uruvelakappaṁ nāma mallānaṁ nigamo. Tatra kho bhagavā bhikkhū āmantesi: “yāvakīvañca, bhikkhave, ariyasāvakassa ariyañāṇaṁ na uppannaṁ hoti neva tāva catunnaṁ indriyānaṁ saṇṭhiti hoti, neva tāva catunnaṁ indriyānaṁ avaṭṭhiti hoti. Yato ca kho, bhikkhave, ariyasāvakassa ariyañāṇaṁ uppannaṁ hoti, atha catunnaṁ indriyānaṁ saṇṭhiti hoti, atha catunnaṁ indriyānaṁ avaṭṭhiti hoti.
In the Land of the Mallas
So I have heard. At one time the Buddha was staying in the land of the Mallas, near the Mallian town named Uruvelakappa. There the Buddha addressed the mendicants: “Mendicants, as long as noble knowledge hasn’t arisen for a noble disciple the four faculties are not stable and fixed. But when noble knowledge has arisen for a noble disciple the four faculties become stable and fixed.