Brahmajalasutta 2.27.20

2.27.20

‘neva hoti na na hoti tathāgato paraṃ maraṇā’ti iti ce maṃ pucchasi, ‘neva hoti na na hoti tathāgato paraṃ maraṇā’ti iti ce me assa, ‘neva hoti na na hoti tathāgato paraṃ maraṇā’ti iti te naṃ byākareyyaṃ,

whether a realized one neither still exists nor no longer exists after death. If I believed that to be the case, I would say so.