Brahmajalasutta 3.3.2

3.3.2

Ye hi keci, bhikkhave, samaṇā vā brāhmaṇā vā uddhamāghātanikā asaññīvādā uddhamāghātanaṃ asaññiṃ attānaṃ paññapenti, sabbe te imeheva aṭṭhahi vatthūhi, etesaṃ vā aññatarena, natthi ito bahiddhā …

Any ascetics and brahmins who assert that the self lives on after death in a non-percipient form do so on one or other of these eight grounds. Outside of this there is none.