大乘起信論義記 3.62

3.62

The former three defiled minds are all named coarse; among them, the first, attachment-conjoined defilement, is even coarser, hence it is called 'the coarsest among the coarse'. Those in the ranks of the three worthies are called inner ordinary persons; they can become aware of this defilement, hence it is called 'the realm of ordinary persons'.