大方廣佛華嚴經疏 3.28

3.28

第七展卷無礙者，謂正前展時即後常卷，正後卷時即前常展。展時即卷故，無量無邊法門海，一言演說盡無餘；卷時即展故，如來於一語言中，演說無邊契經海。

Seventh, the non-obstruction of unfolding and rolling up: this means that precisely when unfolding as described before, it is constantly rolled up as described after; precisely when rolling up as described after, it is constantly unfolded as described before. Because unfolding is itself rolling up: "The ocean of immeasurable and boundless Dharma gates / Is expounded completely in a single word without remainder." Because rolling up is itself unfolding: "The Tathāgata within a single speech / Expounds a boundless ocean of sūtras."