《太平广记·卷二百八十九·妖妄二》
李长源曾经练过气功，并学过巫师的步法和方术，几十年了，自称已经领悟了其中的精妙和要领，道法也练成了。
李长源常服气导引，并学禹步方术之事，凡数十年。自谓得灵精妙，而道已成。
Li Changyuan once practiced qigong, and learned the rituals and magic of a warlock. For decades, he claimed to have understood the subtleties and key points of the art, and had mastered the Tao.