Visuddhimagga XIV-78

Yaṃ panettha hadayarūpaṃ nāma, taṃ vatthu na dvāraṃ.

（三）次以心（所依处）色名为「是所依处非门」；

Ñ(XIV,78): Here, however, what is called the materiality of the heart is physical basis, not door (see DhsA. 82f.);

Viññattidvayaṃ dvāraṃ na vatthu.

（身、语）二表名为「是门非所依处」；

Ñ: the two intimations are door, not physical basis;

Pasādarūpaṃ vatthu ceva dvārañca.

净色名为「是所依处是门」；

Ñ: sensitive matter is both physical basis and door;

Sesaṃ neva vatthu na dvāranti

余者名为「非所依处非门」。

Ñ: the rest are neither physical basis nor door.

evaṃ vatthādicatukkavasena catubbidhaṃ.

如是依所依处的四法为四种。

Ñ: So it is four kinds according to the physical basis tetrad.