大般涅槃經義記 7.427

7.427

下明無因，「有凡復言心貪無因」舉他無義，「以時節」下釋成無義，「隨時節生」明本無因。

Below, it explains no cause: "there are also ordinary persons who say that the mind's greed is without cause" adduces the other's baseless meaning; from "through the seasons" downward, it explains and completes the baseless meaning; and "arising in accordance with the seasons" clarifies that it is originally without cause.