大般涅槃經集解 4.61

4.61

案法瑤曰：此就法身為難也。僧宗曰：雖為食所資，極此一生，故言後邊也。既已成佛，惑必盡，故言無煩惱身也。

Fayao comments: This raises an objection in terms of the dharmakāya. Sengzong says: Although nourished by food, it was the culmination of this single life, so it says 'the final limit'. Having already become a Buddha, afflictions must be exhausted, so it says 'a body without afflictions'.