大般涅槃經義記 3.340

3.340

「如是歸三則得無畏」，答上云何當趣無畏。以歸如是一體三寶斷離邪過，故得成佛，永無所畏。

"Taking refuge in the three in this way, one then attains fearlessness" answers the above [question of] how one should proceed toward fearlessness. Because by taking refuge in such Three Jewels of a single substance one cuts off and leaves behind heterodox faults, one is therefore able to accomplish buddhahood and forever be without fear.