大般涅槃經集解 2.41

2.41

案僧宗曰：既覩三瑞，寧得不悲。更相曉喻，設敦請之計也。寶亮曰：舊解云「眾生若壽命一劫，則請之一劫壽。若半劫，則請半劫也。」自意不然，蓋隨俗也。于時人情願佛住世，豈容指願一劫半劫？就少為言，恐多難冀耳。慧朗曰：此下第二階，有兩意：第一先相曉勸也。

Sengzong states: Having seen the three auspicious signs, how could they not grieve? Admonishing one another, they devised a plan of earnest entreaty.
Baoliang states: An older interpretation says: "If a living being's lifespan was one eon, they pleaded for a lifespan of one eon. If half an eon, they pleaded for half an eon." In my own view, this is not so; it was probably following conventional ways. At that time, people wished in their hearts for the Buddha to abide in the world; how could they specifically wish for one eon or half an eon? Speaking in terms of little, it was out of fear that much would be difficult to hope for.
Huilang states: Below this is the second stage, with two points: first, advising and encouraging one another beforehand.