《左传·僖公·僖公八年》
冬季，周王室的使者来鲁国讣告丧事，由于发生祸难，所以讣告迟了。
冬，王人来告丧，难故也，是以缓。
In the winter, the envoy of the Zhou royal family came to the State of Lu to announce the news of the mourning, which was delayed due to the disaster.