大日經秘密曼荼羅品所說。淨治行者三業之真言也。吽[口*藍][口*路]，身道真言。訶囉鶴，語道真言。[口*藍][口*路]，意道真言。大疏十四曰：「此三道真言，即攝如來身語意平等法門。然此三真言，若著莎訶字亦爾，若不著亦得，行者得意時，自著方便也。」
Three magical "true words" or terms of Shingon for self-purification, i.e. 吽[口*藍] [口*落] which is the "true word" for 身 the body; 訶囉鶴 for 語 the mouth or speech; and [口*藍] [口*落] for 意 the mind.