Gopalacampu 1.28.63

1.28.63

[48] dūty uvāca-
nyāye yuktau pramāṇe ca sthito madhyastha ucyate |
paraṃ madhye sthito yaḥ syāt sa madhya-sthāvaraḥ smṛtaḥ ||

[48] The female messenger said:
"One who abides by justice, reason, and authority is called an impartial mediator (madhya-stha);
but one who merely stands in the middle (madhye sthitaḥ) is regarded as an immovable object in the middle (madhya-sthāvara).