Historical Records of the Song dynasty from Beginning to End (《宋史紀事本末》), "vol. 10"; quote: (陳橋之變，後聞之曰：「吾兒素有大志，今果然矣。」), rough translation: "After hearing about the Chenqiao mutiny, she said: 'My son always has great aspirations; now it's turned out to be so.'"
