淨名經集解關中疏 2.102

2.102

又問。身孰為本。答曰。欲貪為本　二問答也。肇曰。愛為生本長眾結縛。凡在有身靡不由之。又云。欲愛住地也。

He asked again: "What is the root of the body?" He replied: "Desire and craving are the root." This is the second exchange. Sengzhao says: "Craving is the root of birth, nurturing the various fetters. All who possess a body invariably stem from it." It is also said: "This is the entrenchment of desire-craving."