Gaddulabaddhasutta 2.7

2.7

viññāṇaṃ attato samanupassati, viññāṇavantaṃ vā attānaṃ; attani vā viññāṇaṃ, viññāṇasmiṃ vā attānaṃ.

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