《资治通鉴·唐纪·唐纪二十四》
右卫骑曹参军西河县人宋务光上疏认为： 水属阴类，是臣下、女人之象，恐怕是后宫有干预外朝政事的，陛下应当设法防患于未然；现在连日大雨不止，朝廷于是关闭坊市北门来祈求晴天，以至于使民间称坊门为宰相，说是朝廷让它来调解阴阳的。
右卫骑曹参军西河宋务光上疏，以为： 水阴类，臣妾之象，恐后庭有干外朝之政者，宜杜绝其萌。今霖雨不止，乃闭坊门以禳之，至使里巷谓坊门为宰相，言朝廷使之燮理阴阳也。
Song Wuguang, the military secretary of the Right Guards and from Xihe County, wrote a memorial saying: Water belongs to the yin category, which is the symbol of ministers and women. I'm afraid that the harem will interfere with the external affairs of the government. Your Majesty should take precautions in advance. Now that there has been heavy rain for days, the imperial court has closed the north gate of the market to pray for a clear day. As a result, people call the market gate a prime minister, saying that the imperial court asked it to regulate yin and yang.