華嚴經探玄記 19.122

19.122

第五難勝地知識中，初舉法勸修中，同佛證如，故在道場。亦與前地同證真如，故云去我不遠。五地禪增，故名寂靜音。處寶等，明列位主伴。

Regarding the spiritual friend of the fifth bhūmi, the Difficult to Conquer (Sudurjayā): in the first part, raising the Dharma to encourage cultivation, because she realizes suchness together with the Buddha, she is present at the bodhimaṇḍa. Also, because she realizes suchness in common with the previous bhūmi, it says "not far from me." Since dhyāna increases in the fifth bhūmi, she is named Tranquil Sound (Śāntasvarā). "Dwelling in jewel..." and so forth makes clear the arrangement of the stage's primary and attendant.