Bhaddekarattasutta 9.7

9.7

na viññāṇaṃ attato samanupassati, na viññāṇavantaṃ vā attānaṃ, na attani vā viññāṇaṃ, na viññāṇasmiṃ vā attānaṃ—

consciousness as self, self as having consciousness, consciousness in self, or self in consciousness.