Majjhima Nikaya 4:45
SUJATO‘yo me ayaṁ attā vado vedeyyo tatra tatra kalyāṇapāpakānaṁ kammānaṁ vipākaṁ paṭisaṁvedeti so kho pana me ayaṁ attā nicco dhuvo sassato avipariṇāmadhammo sassatisamaṁ tatheva ṭhassatī’ti.
‘This self of mine is he, the one who speaks, the one who knows, who experiences the results of good and bad deeds in all the different realms. This self is permanent, everlasting, eternal, and imperishable, and will last forever and ever.’