大乘起信論義記 3.350

3.350

又是菩薩一發心後，遠離怯弱，畢竟不畏墮二乘地。若聞無量無邊阿僧祇劫勤苦難行乃得涅槃，亦不怯弱，以信知一切法從本已來自涅槃故。

[The Śāstra says:] 'Furthermore, once this bodhisattva has aroused the mind, being far removed from faintheartedness, they definitely do not fear falling into the ground of the two vehicles. Even if they hear that only after toiling through immeasurable and limitless asaṃkhyeya eons in difficult practices is nirvāṇa attained, they are also not fainthearted, because through faith they know that all dharmas have inherently been in nirvāṇa from the very beginning.'