《左传·僖公·僖公三十三年》
秦穆公穿着素服住在郊外，对着被释放回来的将士号哭，说： 我没有听蹇叔的话，使你们几位受到侮辱，这是我的罪过。
秦伯素服郊次，乡师而哭曰： 孤违蹇叔以辱二三子，孤之罪也。
Duke Mu of Qin wore white hemp clothes and lived in the suburbs. He cried facing the warriors who had been released and said: I did not listen to Jian Shu, and so you have all been humiliated. This is my crime.