大乘起信論裂網疏 2.50

2.50

若超過菩薩地，究竟道滿足，一念相應覺心初起，始名為覺。遠離覺相，微細分別究竟永盡，心根本性常住現前，是為如來名究竟覺。

"If one surpasses the bodhisattva stages and the ultimate path is fulfilled, in a single thought-moment corresponding [to truth] one awakens to the first arising of the mind, which is first called enlightenment. Being far removed from the mark of enlightenment, subtle discrimination is definitively and permanently exhausted, and the fundamental nature of the mind manifests constantly present: this is the Tathāgata, called ultimate enlightenment."