成唯識論演祕 3.870

3.870

彼小乘者不許第八。第八既無，便無喻體。由無喻依，二立便無，名無俱不成。

Those Hīnayāna adherents do not accept the eighth consciousness. Since the eighth does not exist [for them], there is no basis for the example. Because there is no substratum for the example, neither of the two established [properties] exists; this is called 'neither is established.'