《管子·五行》
因此，春是工师，夏是司徒，秋是司马，冬天的性质则相当于理狱的官职。
是故春者土师也，夏者司徒也，秋者司马也，冬者李也。
Therefore, spring is an engineer, summer is a Situ, autumn is a Sima, and the nature of winter is equivalent to the official position of Liyu.