《汉书·传·眭两夏侯京翼李传》
四孟都出来，就会改变王命；四季都出来，是占星家非常忌讳的。
四孟皆出，为易王命；四季皆出，星家所讳。
If it emerges during all four seasonal solstices it will change the king’s mandate; if it emerges during all four seasons it is a development that astrologers regard with utmost apprehension.