《魏书·列传·卷六十一》
夜里二更时分，甑生等人打开大眼棺材，延宝奇怪地询问，征南射死了他。
夜二更，甑生等开大眼棺，延宝怪而问之，征南射杀之。
At the second watch of the night, Zheng Nan and the others opened Dayan's coffin. Yan Bao asked in surprise, and Zheng Nan shot him dead.