法華玄論 7.66

7.66

答：如說大般涅槃而道成羅漢，《維摩經》廣辨淨佛國土而取證小乘，如是等皆是小緣聞大而不稱大，故一音之名正主於大也。

Answer: As when the Great Parinirvāṇa is taught and the path achieved is that of an arhat, or the Vimalakīrtinirdeśa extensively distinguishes purifying the Buddha land while they realize the Small Vehicle—all such cases are small capacities hearing the great without corresponding to the great, and therefore the name 'single voice' primarily refers to the great.