大乘起信論義記 3.474

3.474

別解中，初一善友攝護益。以修此真如三昧故，諸佛菩薩法應護念，令得勇猛勝進不退也。

In the distinct explanation, the first is the benefit of being gathered and protected by good friends. Because of cultivating this samādhi of tathatā, the Buddhas and bodhisattvas naturally protect and remember them, causing them to make valiant and superior progress without retrogression.