求隂遁太乙直使之法
太乙金镜式经 · section 8 · 王希明 奉敕撰 · 666 characters
Original text
夏至起巽六甲之日夜半在九宫 以巽东南为九宫也 六已之日夜半在四宫 以震东方为四宫 歴巽离坤兑四卦八宫 行四卦八宫之地不游中五也 凡一百八十二日八分日之五太乙变行 太乙变行以临行也 巽一纪二甲仲辰夜半甲子太乙在九宫吕申为天目计神申巽二纪二巳孟辰夜半甲子太乙在四宫大威为天目计神申巽三纪二甲季辰夜半甲子太乙在九宫隂徳为天目计神申巽四纪二已仲辰夜半甲子在四宫吕申为天目计神申巽五纪二甲孟辰夜半甲子太乙在九宫大威为天目计神申巽六纪二巳季辰夜半甲子太乙在四宫隂徳为天目计神申臣希明推此隂阳二遁定六纪之法并是张良所定之日法有定准气无盈缩维以为常今更考较筭术度气深浅然后推之以定宫次庶合深旨 按张良时计六纪云二纪季辰冬至之日夜半甲子干六宫纪太乙在六宫大炅为天目者乘气而行则合冬至气应太乙方在一宫武徳天目岂有才入天正以行五纪一百八十二日八分日之五太乙小雪气内太乙甲巳变行或在立冬气终已经之纪则变化无复纪纲又云一百八十二日八分日之五若此则一年三百六十五日四分日之一中分言之若气应则早晚或未之定臣今但以冬至气应则太乙变行亦不分阳日隂日孟仲季辰以此为元又自干毕震三十六纪计日而言始行一百八十日犹有二日八分日之五即却用干之初纪至于气变入幽行以司鬼事若气应早晚断在临时夏至以后变顺为从巽终兑唯前冬至以下十精
命甲巳仲孟季等悉皆仿此 帝问曰张良与四皓有所未通乎荅曰是何言欤张良所言己未日冬至入干之六纪者谓上元之时甲已仲辰冬至在干之一纪若至己未望初甲子巳在干之六纪此则相望而言凡设法规矩事合如此非诸冬至皆类于斯也且四计之中时计尤要失之毫髪将何敢用臣以开元十八年三月二十日于含元殿帝问太
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