大方廣佛華嚴經搜玄分齊通智方軌 4.24

4.24

一釋名者，得大法身，具足自在，故名法雲地。

First, explaining the name: because one attains the great dharmakāya and is fully endowed with sovereignty, it is called the Cloud of Dharma Bhūmi (Dharmameghā-bhūmi).