《资治通鉴·后晋纪·后晋纪二》
宋齐丘虽然任左丞相，但不能参预政事，心里怨怒，听说南唐主所作词中称是 布衣之交 ，便抗辩说： 我当老百姓时，陛下是刺史，现在当了天子，可以不用老臣了。 
齐丘虽为左丞相，不预政事，心愠怼，闻制词云 布衣之交 ，抗声曰： 臣为布衣时，陛下为刺史；今日为天子，可不用老臣矣。 
Despite being appointed as the Left Prime Minister, Song Qiqiu was excluded from politics and became resentful. Upon hearing that the Emperor had written that they were commoners, he protested, "When I was a commoner, Your Majesty was a magistrate. Now that you are emperor, you can abandon your old minister."