釋迦氏譜 1.201

1.201

夫法王出世開俗為先。俗則祖習曾高。族氏之緣紹續故。隨俗命氏如前所列。法門所制無擁為初。四姓入者同皆沒滅。但衣法種而為後嗣。故增一云。四河入海無復本名。同名大海。四姓出家無復本姓但言沙門釋迦子。所以然者。生由我生成從法成。當求方便得作釋子。當如是學。彌沙塞長阿含云。乃至彌勒佛時。諸比丘等姓慈。皆言慈子。

Now, when the Dharma King appears in the world, opening up the secular comes first. In the secular realm, ancestral traditions trace back to great-grandfathers, and clan affiliations maintain succession; hence clans are designated according to convention, as listed before. In the institutions of the Dharma Gate, unobstructed equality is foremost. Those entering from the four castes are all alike extinguished [in caste distinction]; wearing only the seed of the Dharma, they become its heirs. Therefore the Ekottarika Āgama says: 'When the four rivers enter the ocean, they no longer have their original names and are all named the Great Ocean; when the four castes go forth from the household life, they no longer have their original surnames, but are simply called śramaṇas, sons of Śākya.' Why is this? Birth is born from me; completion is completed from the Dharma. One should seek skillful means to become a son of Śākya and should learn in this manner. The Mahīśāsaka and Dīrgha Āgama say: 'Down to the time of Maitreya Buddha, the bhikṣus will have the surname Maitrī, and all will be called sons of Maitrī.'