菩薩從兜術天降神母胎說廣普經 2.23

2.23

爾時，坐中有菩薩名曰喜見——辯才無礙登躡十住，如來所行悉能總持——即從座起偏露右臂右膝著地，叉手合掌前白佛言：「善哉！世尊！今聞此法至未曾有，過去無數恒沙如來，有入涅槃不入涅槃。若入涅槃，欲界眾生云何得度？若如來不入涅槃，彼諸如來住何佛界？」

At that time, in the assembly there was a bodhisattva named Priyadarśana—possessing unimpeded eloquence, having ascended to the ten abodes, and able to retain all the practices of the Tathāgata. He immediately arose from his seat, bared his right shoulder, knelt with his right knee on the ground, joined his palms with fingers clasped, went forward and said to the Buddha: "Excellent, Bhagavat! Now hearing this Dharma is unprecedented. Did the past countless Ganges-sands Tathāgatas enter nirvāṇa or not enter nirvāṇa? If they entered nirvāṇa, how are sentient beings of the desire realm to be delivered? If the Tathāgatas do not enter nirvāṇa, in what Buddha-realms do those Tathāgatas abide?"