金光明最勝王經疏 2.22

2.22

經　是時妙｀幢菩薩獨於靜處作是思惟：「以何因緣，釋迦牟尼如來壽命短促唯＇八十年？」

Sūtra: At that time, Bodhisattva Ruciraketu, alone in a quiet place, had this thought: 'For what cause and condition is the life-span of the Tathāgata Śākyamuni so short, only eighty years?'