Quotes from Sūtra on Upāsaka Precepts,
Vol. 1, Chapter 5
On Three Kinds of Enlightenment
Sujata asked, “World-Honored One, the Buddha has said that there are two kinds of bodhisattvas, the lay ones and the ordained ones, and that there are three kinds of bodhi (enlightenment): that of the śrāvakas, pratyekabuddhas, and Buddhas. If one who attains bodhi (enlightenment) is called a Buddha, why is it that śrāvakas and pratyekabuddhas, who also attain bodhi (enlightenment), are not called Buddhas? If one who realizes the Dharma nature is called a Buddha, why is it that śrāvakas and pratyekabuddhas, who also realize the Dharma nature, are not called Buddhas? If one who has all wisdom is a Buddha, why is it that the śrāvakas and pratyekabuddhas, who also have all wisdom, are not called Buddhas? All wisdom denotes the Four Noble Truths.”
《優婆塞戒經》卷 一
〈三種菩提品〉第五
【善生言：「世尊！如佛所說菩薩二種：一者在家，二者出家；菩提三種：一者聲聞菩提，二者緣覺菩提，三者諸佛菩提；若得菩提，名為佛者，何以故聲聞、辟支佛人不 名為佛？若覺法性名為佛者，聲聞、緣覺亦覺法性，以何緣故不名為佛？若一切智名為 佛者，聲聞、緣覺亦一切智，復以何故不名為佛？言一切者即是四諦。」】