華嚴經探玄記 2.18

2.18

Second, concerning interpenetration and containment: there are two aspects. First, it directly and fully gathers all three worlds without remainder, because only when possessing these three matters does one become a Buddha. The three bodies and two bodies are only gathered within the enlightened beings among the three [worlds]; the wondrous pure lands and the bodies born together [with them] are all without exception gathered within this. Second, within each pore of the direct retribution and within each dust mote of the circumstantial retribution, all dharmas such as the three worlds are repeatedly and fully gathered, appearing like Indra's net, which can be seen by considering it accordingly.