大般涅槃經義記 5.361

5.361

「無諍」已下明無學道，於中先明無諍三昧，利根羅漢觀察欲界一切眾生，知起煩惱，起將護心不與其競，名無諍三昧。

From 'non-contention' downward clarifies the path of no-learning, within which it first clarifies the non-contention samādhi: an arhat of sharp faculties observes all sentient beings in the desire realm, knows that afflictions arise [in them], and gives rise to a mind of protection so as not to contend with them; this is called the non-contention samādhi.