Majjhima Nikaya 1:135
SUJATOnibbānaṁ nibbānato abhiññāya nibbānaṁ mā maññi, nibbānasmiṁ mā maññi, nibbānato mā maññi, nibbānaṁ meti mā maññi, nibbānaṁ mābhinandi.
Having directly known extinguishment as extinguishment, let them not conceive it to be extinguishment, let them not conceive it in extinguishment, let them not conceive it as extinguishment, let them not conceive that ‘extinguishment is mine’, let them not approve extinguishment.