《北齐书·本纪·卷二》
自从东、西魏交战后，邺下常有黄黑蚂蚁各自为阵进行搏斗，占卜的人认为黄色是东魏士兵的戎装，黑色为西魏军卒的衣服，民间便以此占验吉凶胜负。
自东、西魏构兵，邺下每先有黄黑蚁阵斗，占者以为黄者东魏戎衣色，黑者西魏戎衣色，人间以此候胜负。
Since the battle between the east and west Wei, there were often yellow and black ants below Ye, who formed their own battle lines to fight, fortune-tellers thought the yellow ones were the uniforms of the soldiers in the east Wei, and the blacks ones were the uniforms of the soldiers of the west Wei, and folks took this as a sign of auspiciousness and victory.