翻譯名義集 1.43

1.43

【迦葉波】此云飲光。二萬歲時，出成正覺。至百歲時，釋迦牟尼居兜率天，四種觀世。故《大論》云：「一者觀時，人壽百歲，佛出時到。二觀土地諸國，常在中國生故。三觀種姓，剎利種姓勢力大，婆羅門種智慧大，隨時所貴，佛於中生。四觀生處，何等母人，能懷那羅延力菩薩，亦能自護淨戒？如是觀竟，唯中國迦毘羅婆淨飯王后，能懷菩薩。如是思惟已，於兜率天下，不失正慧，入於母胎。」

[Kāśyapa]: Here translated as Light Drinker (Yinguang). When the lifespan was twenty thousand years, he appeared and accomplished right awakening. When the lifespan reached one hundred years, Śākyamuni dwelt in Tuṣita Heaven and observed the world in four ways. Thus the Mahāprajñāpāramitopadeśa says: "First, he observed the time: human lifespan being one hundred years, the time for a Buddha to appear had arrived. Second, he observed the land and its states: [a Buddha] is always born in the central country. Third, he observed the clan and caste: the kṣatriya caste has great authority, while the brāhmaṇa caste has great wisdom; whichever was honoured by the world at the time, the Buddha was born among them. Fourth, he observed his place of birth: what woman would be capable of conceiving a bodhisattva with the strength of Nārāyaṇa while also being able to preserve her own pure precepts? Having observed thus, only the queen of King Śuddhodana in Kapilavastu in the central country was capable of conceiving the bodhisattva. Having reflected thus, he descended from Tuṣita Heaven, and without losing right wisdom, entered the maternal womb."