《汉书·志·天文志》
水星出现在东方，金星出现在西方，或者水星出现西方，金星出现东方，是相隔之状态，四野虽有军兵，但没有战斗。
辰星出东方，太白出西方。若辰星出西方，太白出东方，为格，野虽有兵，不战。
When Water Star appears in the east and Venus in the west, or Water Star in the west and Venus in the east, it indicates distance between them, and though there may be troops in the four directions, they will not fight.