Majjhima Nikaya 5:186
SUJATO‘so loko so attā, so pecca bhavissāmi nicco dhuvo sassato avipariṇāmadhammo, sassatisamaṁ tatheva ṭhassāmī’ti.
‘The cosmos and the self are one and the same. After death I will be that, permanent, everlasting, eternal, imperishable, and will last forever and ever.’