淨名經集解關中疏 2.45

2.45

又問。地大水大火大風大。於此四大何大之病　三約四問也。肇曰。身之生也。四大所成上總推身合。別推四大曲尋其本。

He asked again: "Earth element, water element, fire element, wind element—among these four great elements, which great element's illness is it?" Third, he inquires with reference to the four [elements]. [Seng]zhao says: "The birth of the body is constituted by the four great elements. Above, he broadly investigated conjunction with the body; here, he specifically investigates the four great elements, thoroughly probing their origin."