淨名經集解關中疏 2.106

2.106

又問。無住孰為本。答曰。無住則無本　此窮無明無依本也。肇曰。若以心動為本則有有相理極初動。更無本也。若以無法為本則有因無生。無不因無故更無本。

He asked again: "What is the root of non-abiding?" He replied: "Non-abiding has no root." This exhausts ignorance as having no supporting root. Sengzhao says: "If one takes the movement of the mind as the root, then having characteristic signs principle culminates in the initial motion, having no further root. If one takes the non-existence of dharmas as the root, then existence is produced dependent on non-existence; non-existence is not dependent on non-existence, hence there is no further root."