大方廣圓覺修多羅了義經略疏 2.1215

2.1215

梵語也，此含三義故存梵不譯：一怖魔、二乞士、三淨戒。

A Sanskrit word. Because it contains three meanings, the Sanskrit is kept untranslated: first, 'frightening Māra'; second, 'alms-gatherer'; third, 'pure precepts'.