首楞嚴義疏注經 5.197

5.197

由斯觀察，塵觸既盡，妙觸現前，得無生忍，名佛子住。以善能守護，令妄不起，令覺不動，名跋陀婆羅。

By means of this contemplation, dust touch having been exhausted, wondrous touch appeared before him; attaining the forbearance of non-arising dharmas, it is called 'the dwelling of the Buddha's child.' Because he is skilled at guarding and protecting, causing delusions not to arise and awareness not to move, he is named Bhadrapāla.