《宋史·本纪·卷三》
评论说：过去唐尧、虞舜因为禅让，商汤、周武因为征伐，都面南背北而有天下。
赞曰：昔者尧、舜以禅代，汤、武以征伐，皆南面而有天下。
Comment: In the past, Tang Yao, and Yu Shun ruled by abdication; Shang Tang and Zhou Wu conquered the world by force. They all faced south and turned their backs to the north, and thus the whole world was under their control.