《礼记·丧大记》
孝子不在家而在国内的，就等孝子回来主持丧事；如果在国外不能回来，那就只好由别人主持殡葬。总之，丧家绝嗣的情况是有的，丧事无人主持的情况却是没有的。
在竟内则俟之，在竟外则殡葬可也。丧有无后，无无主。
If the filial son is at home but not in the country, it is necessary to wait for him to come back to preside over the funeral; if he is abroad and cannot come back, someone else has to preside over the funeral. In a word, the situation in which mourners have no descendants does exist, but the situation in which no one presides over the funeral does not happen.