ديغا نيكايا 1:643
SUJATOSabbaso ākāsānañcāyatanaṁ samatikkamma ‘anantaṁ viññāṇan’ti viññāṇañcāyatanaṁ upasampajja viharati,
Going totally beyond the dimension of infinite space, aware that ‘consciousness is infinite’, they enter and remain in the dimension of infinite consciousness.