大方廣佛華嚴經隨疏演義鈔 60.105

60.105

疏「若依根本亡故憂悲隨盡」者，身受名苦，心受曰憂。先由身苦，後起心憂，是故說苦以為根本。憂為涅槃巨害，故偏言之。若據根本，應言無苦。

Regarding the commentary's "If based on the root being eliminated, grief and sorrow are accordingly exhausted": bodily sensation is called suffering, while mental sensation is called grief. First, due to bodily suffering, mental grief subsequently arises; therefore, suffering is said to be the root. Grief is a great obstacle to nirvāṇa, so it is mentioned specifically. If based on the root, it should say "absence of suffering."