Sei Shonagon, who was serving Teishi/Sadako at that time, wrote about this event in the "Makurano Soshi" (The Pillow Book) 5th Story titled "When the Empress went down to the residence of Daishin Narimasa..."
当時定子に仕えていた清少納言は、この時の様子を『枕草子』第五段『大進生昌が家に、宮の出でさせ給ふに、』に記している。