《贞观政要·卷二·论纳谏》
皇太子小时候在我面前，常见我听到进谏心情很愉悦，因此养成喜欢纳谏、进谏的习性，所以才有今天的进谏。 
皇太子幼在朕膝前，每见朕心说谏者，因染以成性，故有今日之谏。 
As a young crown prince, I often witnessed the emperor delighting upon receiving advice, which is why I have a habit of welcoming advice and offering advice, and that resulted in your advice today.