淨名經集解關中疏 1.313

1.313

所以者何。憶念我昔曾於林中宴坐樹下　此二所以下徵釋不堪所由也。宴安也。禪定安心故云宴坐。聲聞入定不過八地定及滅盡定。皆是厭下麁動忻於上定故。示隱身於林息亂於定。此非真宴寂。

"'Why is this? I remember that in the past I was once sitting in quiet meditation under a tree in the forest.'" This second [part], from "Why is this?" onward, inquires into and explains the reason for his incompetence. Yān (宴) means peace and quiet. Calming the mind through dhyāna is therefore called "sitting in quiet meditation" (宴坐). When śrāvakas enter absorption, they do not exceed the concentrations of the eight stages and the concentration of cessation (nirodha-samāpatti). These all involve revulsion toward lower, coarse movement and delight in higher concentration. Therefore, he displayed hiding his body in the forest and resting distraction in concentration; this is not true quiet meditation.