瑜伽論記 18.585

18.585

下明佛不數入無諍定。謂若應以興諍而調伏者，即便諍論故不數數入。

Below, it explains that the Buddha does not frequently enter the non-contentious concentration: that is, if one should be subdued by stirring up contention, he will then engage in contentious debate; therefore he does not enter it frequently.