所以在《大藏经》密教部经典前总书有未经上师许可欲读密典须诵大轮金刚陀罗尼二十一遍，旨在提醒佛子慎莫越三昧耶！
Therefore on the preface of all esoteric sutras in Tripitaka , there is always a warning : one must recite the Great Wheel Vajra Dharani twenty-one times , thus alerts Buddhists not to breach samaya .
密教部