《容斋随笔·卷十四·蹇解之险》
如果推演爻象，就有另外一种解释，外为一个《坎》卦，各爻所同，而从六二向上推，上承九三爻、六四爻，又力《坎》笋，这即是一卦之中有两个坎卦，于是说两个 奏 。
若寻绎爻画，则有说焉，盖外卦一《坎》，诸爻所同，而自六二推之，上承九三、六四，又为《坎》体，是一卦之中已有二《坎》也，故重言之。
If one deduces the hexagram, there is another explanation, the outside is a "Kan" hexagram, the hexagrams are the same, and from six or two upward, above the 93 hexagram, 64 hexagram, and force "Kan" bamboo shoots, this is two "Kan" hexagrams in one hexagram, so two "奏" are said.