《史记·三十世家·赵世家》
进宫接受了庄严的王命，出宫后却不能完成，还有比这更严重的负义吗？
进受严命，退而不全，负孰甚焉。
I accepted the solemn king's order in the palace, but I could not complete it after leaving the palace, is there anything more serious than this betrayal?